/* roulang page: index */
:root {
    --ink: #16171A;
    --ink-2: #202226;
    --ink-deep: #101114;
    --paper: #F4F2ED;
    --paper-deep: #EAE7DF;
    --white: #FFFFFF;
    --signal: #F4530F;
    --signal-hover: #D8440C;
    --text-main: #1D1E20;
    --text-muted: #6D7077;
    --text-on-dark: #ECECE8;
    --line: rgba(22, 23, 26, 0.12);
    --line-dark: rgba(255, 255, 255, 0.14);
    --success: #1C7C4D;
    --error: #C03535;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 14px;
    --shadow-1: 0 2px 4px rgba(0, 0, 0, .04), 0 18px 40px -20px rgba(0, 0, 0, .14);
    --shadow-2: 0 6px 18px rgba(0, 0, 0, .08), 0 30px 60px -22px rgba(0, 0, 0, .18);
    --container: 1240px;
    --header-h: 72px;
    --space-section: clamp(72px, 8vw, 112px);
    --ease: .28s cubic-bezier(.3, .7, .3, 1);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-main);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body.no-scroll {
    overflow: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

ul,
ol {
    list-style: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.section {
    padding: var(--space-section) 0;
}

.section-head {
    max-width: 820px;
    margin-bottom: 52px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--signal);
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 24px;
    height: 3px;
    background: var(--signal);
    display: inline-block;
    flex: 0 0 auto;
}

.section-head h2 {
    font-size: clamp(30px, 4.2vw, 46px);
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-top: 14px;
    color: var(--ink);
}

.section-head p {
    margin-top: 16px;
    color: var(--text-muted);
    font-size: 17px;
    max-width: 720px;
}

@media (max-width: 767px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .section-head {
        margin-bottom: 34px;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    font-weight: 700;
    font-size: 15px;
    line-height: 1;
    padding: 0 26px;
    height: 52px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease, transform .15s ease;
    text-align: center;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--signal);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--signal);
    color: var(--ink);
    border-color: var(--signal);
}

.btn-primary:hover {
    background: var(--signal-hover);
    border-color: var(--signal-hover);
    color: var(--ink);
    box-shadow: 0 10px 28px -8px rgba(244, 83, 15, .55);
}

.btn-primary:active {
    transform: translateY(1px);
    box-shadow: none;
}

.btn-secondary {
    background: var(--ink);
    color: var(--white);
    border-color: var(--ink);
}

.btn-secondary:hover {
    background: var(--ink-2);
    border-color: var(--ink-2);
    color: var(--white);
}

.btn-secondary:active {
    transform: translateY(1px);
}

.btn-ghost {
    background: transparent;
    border-color: rgba(255, 255, 255, .5);
    color: var(--white);
}

.btn-ghost:hover {
    background: var(--signal);
    border-color: var(--signal);
    color: var(--ink);
}

.btn-ghost:focus-visible {
    outline-color: var(--signal);
    color: var(--ink);
}

.btn-dark {
    background: var(--ink);
    color: var(--white);
    border-color: var(--ink);
}

.btn-dark:hover {
    background: var(--ink-2);
    color: var(--white);
    transform: translateX(2px);
}

.btn-dark:active {
    transform: translateY(1px);
}

@media (max-width: 380px) {
    .btn {
        padding: 0 18px;
        height: 50px;
        font-size: 14px;
    }
}

/* ===== Tag / Badge ===== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 28px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-main);
    background: var(--white);
    white-space: nowrap;
}

.tag::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--signal);
    flex: 0 0 auto;
}

.tag-dark {
    border-color: rgba(255, 255, 255, .24);
    color: var(--text-on-dark);
    background: transparent;
}

.tag-dark::before {
    background: var(--signal);
}

/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: transparent;
    color: var(--white);
    transition: background .3s ease, box-shadow .3s ease, color .3s ease;
}

.site-header.is-scrolled {
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 1px 0 var(--line), 0 12px 32px -18px rgba(0, 0, 0, .14);
    color: var(--ink);
}

.header-inner {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    flex: 0 0 auto;
    min-width: 0;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    transform: skewX(-8deg);
    flex: 0 0 auto;
}

.logo-mark i {
    display: block;
    width: 6px;
    height: 23px;
    border-radius: 1px;
    background: var(--signal);
}

.logo-mark i:nth-child(2) {
    height: 30px;
    background: var(--signal-hover);
}

.logo-mark i:nth-child(3) {
    height: 18px;
    background: var(--signal);
}

.logo-mark i:nth-child(4) {
    height: 27px;
    background: var(--signal-hover);
}

.logo-text {
    font-size: 21px;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -.01em;
    color: currentColor;
    white-space: nowrap;
}

.logo-text span {
    color: var(--signal);
    margin-left: 2px;
}

.site-header.is-scrolled .logo-text {
    color: var(--ink);
}

.navbar {
    display: flex;
    align-items: center;
    gap: 32px;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: var(--header-h);
    font-size: 15px;
    font-weight: 600;
    color: currentColor;
    opacity: .82;
    transition: opacity .2s ease, color .2s ease;
}

.nav-link:hover {
    opacity: 1;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    border-radius: 0 0 3px 3px;
    background: var(--signal);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .24s ease;
}

.nav-link:hover::after,
.nav-link.is-active::after {
    transform: scaleX(1);
}

.nav-link.is-active {
    opacity: 1;
    font-weight: 700;
}

.header-cta {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
}

.header-cta .btn {
    height: 44px;
    padding: 0 22px;
    font-size: 14px;
}

.burger {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, .28);
    border-radius: 8px;
    cursor: pointer;
    color: currentColor;
}

.burger span {
    display: block;
    width: 17px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    position: relative;
    transition: background .2s;
}

.burger span::before,
.burger span::after {
    content: "";
    position: absolute;
    width: 17px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    left: 0;
}

.burger span::before {
    top: -6px;
}

.burger span::after {
    top: 6px;
}

.site-header.is-scrolled .burger {
    border-color: var(--line);
}

.menu-backdrop {
    display: none;
}

.mobile-menu {
    display: none;
}

/* mobile breakpoint */
@media (max-width: 991px) {
    .navbar-links,
    .header-cta {
        display: none;
    }

    .burger {
        display: inline-flex;
    }

    .mobile-menu {
        display: flex;
        position: fixed;
        top: 0;
        right: -360px;
        bottom: 0;
        width: min(360px, 86vw);
        background: var(--paper);
        color: var(--ink);
        z-index: 1102;
        padding: 28px 26px 40px;
        flex-direction: column;
        justify-content: flex-start;
        box-shadow: -12px 0 34px rgba(0, 0, 0, .14);
        transition: right .3s ease;
        overflow-y: auto;
        border-radius: 0;
    }

    .menu-open .mobile-menu {
        right: 0;
    }

    .menu-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15, 15, 18, .72);
        z-index: 1101;
        opacity: 0;
        visibility: hidden;
        transition: opacity .3s ease, visibility .3s ease;
    }

    .menu-open .menu-backdrop {
        opacity: 1;
        visibility: visible;
    }

    .mobile-menu-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 30px;
    }

    .mobile-menu-top .logo-text {
        color: var(--ink);
    }

    .mobile-close {
        width: 42px;
        height: 42px;
        border: 1px solid var(--line);
        background: var(--white);
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        color: var(--text-main);
        cursor: pointer;
        transition: background .2s, border-color .2s;
    }

    .mobile-close:hover {
        background: var(--paper-deep);
    }

    .mobile-nav-list {
        display: flex;
        flex-direction: column;
    }

    .mobile-nav-list a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 20px;
        font-weight: 800;
        color: var(--ink);
        padding: 16px 0;
        border-bottom: 1px solid var(--line);
    }

    .mobile-nav-list a:hover {
        color: var(--signal);
    }

    .mobile-nav-list a .arrow {
        color: var(--signal);
    }

    .mobile-menu-cta {
        margin-top: 30px;
    }

    .mobile-menu-cta .btn {
        width: 100%;
    }
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 720px;
    display: flex;
    align-items: center;
    color: var(--white);
    background:
        linear-gradient(100deg, rgba(13, 14, 16, .96) 0%, rgba(13, 14, 16, .78) 42%, rgba(13, 14, 16, .3) 72%, rgba(13, 14, 16, .12) 100%),
        url('/assets/images/backpic/back-1.png') center / cover no-repeat;
    padding: 160px 0 92px;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    right: -220px;
    bottom: -120px;
    width: 560px;
    height: 560px;
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 50%;
    pointer-events: none;
}

.hero::before {
    content: "";
    position: absolute;
    right: 30px;
    bottom: 40px;
    width: 260px;
    height: 120px;
    border: 2px solid var(--signal);
    border-left: 0;
    border-bottom: 0;
    opacity: .28;
    transform: skewX(-24deg);
    pointer-events: none;
}

.hero-inner {
    max-width: 760px;
}

.hero .eyebrow {
    opacity: .92;
}

.hero h1 {
    font-size: clamp(32px, 5.6vw, 62px);
    line-height: 1.12;
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-top: 20px;
    text-wrap: balance;
}

.hero-lead {
    font-size: clamp(16px, 1.8vw, 19px);
    line-height: 1.8;
    color: rgba(255, 255, 255, .88);
    margin-top: 24px;
    max-width: 640px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 34px;
}

.hero-points {
    margin-top: 44px;
    border-top: 1px solid rgba(255, 255, 255, .14);
    padding-top: 26px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.hero-points li {
    position: relative;
    font-size: 14px;
    line-height: 1.7;
    padding-left: 16px;
    color: rgba(255, 255, 255, .82);
}

.hero-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 7px;
    height: 7px;
    background: var(--signal);
    border-radius: 1px;
    transform: rotate(45deg);
}

@media (min-width: 992px) and (max-width: 1279px) {
    .hero-points {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 767px) {
    .hero {
        min-height: auto;
        padding: 108px 0 64px;
    }

    .hero-points {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .hero-points li br {
        display: none;
    }
}

/* ===== Pain section ===== */
.pain-section {
    background: var(--paper);
}

.pain-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.pain-item {
    display: grid;
    grid-template-columns: 112px 1fr 1fr;
    align-items: center;
    gap: 28px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 28px 30px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.pain-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-1);
    border-color: rgba(244, 83, 15, .35);
}

.pain-num {
    font-family: "Barlow Condensed", "DIN Alternate", "Arial Narrow", sans-serif;
    font-size: 38px;
    font-weight: 800;
    letter-spacing: .02em;
    color: var(--signal);
    line-height: 1;
}

.pain-num small {
    color: var(--text-muted);
    font-size: 14px;
    font-family: system-ui, -apple-system, "PingFang SC", sans-serif;
    font-weight: 500;
    margin-left: 2px;
}

.pain-item h3 {
    font-size: 21px;
    font-weight: 800;
    line-height: 1.4;
    color: var(--ink);
}

.pain-item p {
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-muted);
    margin-top: 6px;
    max-width: 560px;
}

.pain-middle {
    border-left: 1px solid var(--line);
    padding-left: 28px;
}

.pain-desc {
    border-left: 1px solid var(--line);
    padding-left: 28px;
}

.pain-desc p {
    margin-top: 0;
}

@media (max-width: 1023px) {
    .pain-item {
        grid-template-columns: 80px 1fr;
        gap: 16px 22px;
        padding: 24px;
    }

    .pain-middle {
        border-left: 0;
        padding-left: 0;
    }

    .pain-desc {
        grid-column: 1 / -1;
        border-left: 0;
        padding-left: 0;
        border-top: 1px solid var(--line);
        padding-top: 14px;
    }
}

@media (max-width: 575px) {
    .pain-item {
        grid-template-columns: 58px 1fr;
        padding: 20px;
    }

    .pain-item h3 {
        font-size: 19px;
    }
}

/* ===== Solution section ===== */
.solution-section {
    background: var(--white);
}

.solution-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 48px;
    align-items: start;
}

.solution-sticky {
    position: sticky;
    top: 120px;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 0 24px 0 0;
}

.solution-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.solution-card {
    display: grid;
    grid-template-columns: 64px 180px 1fr 140px 46px;
    gap: 22px;
    align-items: center;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 28px;
    position: relative;
    transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}

.solution-card::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 22px;
    bottom: 22px;
    width: 4px;
    border-radius: 4px;
    background: var(--signal);
    opacity: 0;
    transition: opacity .25s ease;
}

.solution-card:hover {
    box-shadow: var(--shadow-1);
    transform: translateY(-4px);
    border-color: rgba(22, 23, 26, .2);
}

.solution-card:hover::before {
    opacity: 1;
}

.solution-icon {
    width: 58px;
    height: 58px;
    border-radius: 10px;
    background: linear-gradient(145deg, var(--paper), var(--paper-deep));
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--signal);
}

.solution-icon svg {
    width: 30px;
    height: 30px;
}

.solution-type {
    font-family: "Barlow Condensed", "DIN Alternate", "Arial Narrow", sans-serif;
    font-size: 34px;
    font-weight: 800;
    color: rgba(22, 23, 26, .15);
    line-height: 1;
}

.solution-body h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--ink);
    line-height: 1.4;
}

.solution-body p {
    font-size: 14.5px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-top: 6px;
}

.solution-spec {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

.solution-arrow {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--signal);
    transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.solution-card:hover .solution-arrow {
    background: var(--signal);
    border-color: var(--signal);
    color: var(--ink);
}

.solution-media {
    margin-top: 24px;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .12));
}

.solution-media img {
    width: 100%;
    height: 320px;
    object-fit: cover;
}

.solution-media-note {
    position: absolute;
    left: 18px;
    bottom: 18px;
    background: rgba(22, 23, 26, .78);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, .15);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-radius: 6px;
    font-size: 13px;
    padding: 8px 14px;
}

@media (max-width: 1280px) {
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .solution-sticky {
        position: static;
        padding-right: 0;
    }
}

@media (max-width: 992px) {
    .solution-card {
        grid-template-columns: 1fr;
        gap: 14px;
        align-items: start;
    }

    .solution-card::before {
        top: 14px;
        bottom: auto;
        left: 14px;
        right: 14px;
        width: auto;
        height: 4px;
    }

    .solution-spec {
        justify-content: flex-start;
    }
}

/* ===== Stats / number section ===== */
.stats-section {
    background: var(--ink);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.stats-section::after {
    content: "";
    position: absolute;
    right: -160px;
    top: -180px;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, .08);
}

.stats-section::before {
    content: "";
    position: absolute;
    left: -60px;
    bottom: -80px;
    width: 260px;
    height: 260px;
    background:
        linear-gradient(rgba(244, 83, 15, .08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(244, 83, 15, .08) 1px, transparent 1px);
    background-size: 28px 28px;
}

.section-head-light h2 {
    color: var(--white);
}

.section-head-light p {
    color: rgba(255, 255, 255, .72);
}

.section-head-light .eyebrow {
    color: var(--signal);
}

.stats-inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    position: relative;
    z-index: 1;
}

.stat-item {
    border-left: 2px solid rgba(255, 255, 255, .12);
    padding-left: 24px;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stat-item::before {
    content: "";
    width: 30px;
    height: 3px;
    background: var(--signal);
    display: block;
    margin-bottom: 16px;
}

.stat-value {
    font-family: "Barlow Condensed", "DIN Alternate", "Arial Narrow", "Roboto Condensed", sans-serif;
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 800;
    line-height: .9;
    color: var(--white);
    letter-spacing: .01em;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.stat-value .unit {
    font-family: system-ui, "PingFang SC", sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--signal);
}

.stat-label {
    margin-top: 14px;
    color: rgba(255, 255, 255, .75);
    font-size: 15px;
    line-height: 1.6;
}

@media (max-width: 991px) {
    .stats-inner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 520px) {
    .stats-inner {
        grid-template-columns: 1fr;
    }

    .stat-item {
        min-height: auto;
    }
}

/* ===== News section ===== */
.news-section {
    background: var(--paper);
}

.news-headline {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.news-card {
    display: grid;
    grid-template-columns: 320px 1fr;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow .25s ease, transform .25s ease;
}

.news-card:hover {
    box-shadow: var(--shadow-1);
    transform: translateY(-3px);
}

.news-cover {
    position: relative;
    overflow: hidden;
    min-height: 200px;
    background: var(--paper-deep);
}

.news-cover img {
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
    object-fit: cover;
}

.news-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 24px 30px;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.news-meta .cat {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--signal);
    font-weight: 700;
    font-size: 13px;
}

.news-meta .cat::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--signal);
    transform: rotate(45deg);
    display: inline-block;
}

.news-body h3 {
    font-size: 20px;
    line-height: 1.45;
    font-weight: 800;
    color: var(--ink);
}

.news-body h3 a {
    color: inherit;
    transition: color .2s;
}

.news-body h3 a:hover {
    color: var(--signal);
}

.news-body p {
    color: var(--text-muted);
    font-size: 15px;
    margin-top: 10px;
    line-height: 1.75;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    margin-top: 12px;
}

.news-more a {
    font-size: 14px;
    font-weight: 700;
    color: var(--signal);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.news-more a::after {
    content: "→";
    transition: transform .2s;
}

.news-more a:hover::after {
    transform: translateX(3px);
}

.news-empty {
    background: var(--white);
    border: 1px dashed var(--line);
    border-radius: var(--radius-md);
    padding: 44px 24px;
    text-align: center;
    color: var(--text-muted);
}

@media (max-width: 767px) {
    .news-card {
        grid-template-columns: 1fr;
    }

    .news-cover {
        min-height: 190px;
    }

    .news-cover img {
        position: relative;
        width: 100%;
        height: 190px;
    }

    .news-body {
        padding: 20px;
    }
}

/* ===== FAQ section ===== */
.faq-section {
    background: var(--white);
}

.faq-column {
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--line);
}

.faq-item:first-child {
    border-top: 1px solid var(--line);
}

.faq-title {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 24px 4px;
    background: transparent;
    border: 0;
    font-size: 18px;
    font-weight: 700;
    text-align: left;
    color: var(--ink);
    cursor: pointer;
    transition: color .2s ease;
}

.faq-title:hover {
    color: var(--signal);
}

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--line);
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: background .2s ease, border-color .2s ease, transform .3s ease;
}

.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
    background: var(--text-main);
    transition: background .2s;
}

.faq-icon::before {
    width: 10px;
    height: 2px;
}

.faq-icon::after {
    width: 2px;
    height: 10px;
}

.faq-item.active .faq-icon {
    background: var(--signal);
    border-color: var(--signal);
    transform: rotate(45deg);
}

.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
    background: var(--ink);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
}

.faq-answer-inner {
    padding: 0 4px 24px;
    color: var(--text-muted);
    line-height: 1.85;
    font-size: 15px;
    max-width: 800px;
}

.faq-answer-inner p + p {
    margin-top: 12px;
}

/* ===== CTA section ===== */
.cta-section {
    background: var(--signal);
    position: relative;
    overflow: hidden;
    padding: 72px 0;
}

.cta-section::before {
    content: "";
    position: absolute;
    right: -120px;
    top: -120px;
    width: 420px;
    height: 420px;
    border: 2px solid rgba(22, 23, 26, .16);
    transform: rotate(18deg);
    border-radius: 30px;
}

.cta-section::after {
    content: "";
    position: absolute;
    right: 60px;
    bottom: -80px;
    width: 200px;
    height: 200px;
    background: rgba(22, 23, 26, .08);
    transform: skewX(-18deg);
    border-radius: 8px;
}

.cta-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.cta-inner h2 {
    font-size: clamp(26px, 3.6vw, 42px);
    font-weight: 900;
    color: var(--ink);
    line-height: 1.2;
    letter-spacing: -.02em;
}

.cta-inner p {
    margin-top: 12px;
    font-size: 16px;
    color: rgba(22, 23, 26, .84);
    max-width: 640px;
}

.cta-action {
    flex: 0 0 auto;
}

.cta-action .btn-dark {
    height: 58px;
    padding: 0 32px;
    font-size: 16px;
}

@media (max-width: 767px) {
    .cta-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .cta-action .btn-dark {
        width: 100%;
    }
}

/* ===== Footer ===== */
.site-footer {
    background: var(--ink);
    color: rgba(255, 255, 255, .78);
    padding-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, .08);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
    gap: 50px;
    padding-bottom: 56px;
}

.footer-about .brand-logo {
    color: var(--white);
    margin-bottom: 18px;
}

.footer-about .brand-logo .logo-text {
    color: var(--white);
}

.footer-about p {
    font-size: 14.5px;
    line-height: 1.85;
    color: rgba(255, 255, 255, .68);
    max-width: 300px;
    margin-top: 14px;
}

.footer-col-title {
    font-size: 15px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 8px;
}

.footer-col-title::after {
    content: "";
    width: 24px;
    height: 2px;
    background: var(--signal);
    display: block;
    margin-top: 10px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 14px;
}

.footer-links a,
.footer-contact p {
    color: rgba(255, 255, 255, .68);
    transition: color .2s ease, padding-left .2s ease;
}

.footer-links a:hover {
    color: var(--signal);
    padding-left: 2px;
}

.footer-contact {
    font-style: normal;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 14px;
    line-height: 1.8;
}

.footer-contact span {
    display: flex;
    gap: 8px;
}

.footer-contact i {
    color: var(--signal);
    font-style: normal;
    font-weight: 700;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 22px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, .45);
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-bottom a {
    color: inherit;
}

.footer-bottom a:hover {
    color: var(--signal);
}

@media (max-width: 1023px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 575px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .site-footer {
        padding-top: 54px;
    }
}

/* ===== Modal ===== */
.modal-layer {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-layer.is-open {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 15, 18, .72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.modal-box {
    position: relative;
    width: 620px;
    max-width: 100%;
    max-height: 92vh;
    overflow-y: auto;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .3);
    animation: modalIn .3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(18px) scale(.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-main);
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--paper);
    transform: rotate(90deg);
}

.modal-box h2 {
    font-size: 28px;
    font-weight: 900;
    color: var(--ink);
    line-height: 1.25;
}

.modal-box .form-desc {
    color: var(--text-muted);
    font-size: 15px;
    margin-top: 8px;
    margin-bottom: 26px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
}

.form-group label .req {
    color: var(--signal);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    height: 48px;
    border: 1px solid #C6C8CC;
    border-radius: var(--radius-sm);
    padding: 0 14px;
    font-size: 15px;
    background: var(--white);
    color: var(--text-main);
    transition: border-color .2s ease, box-shadow .2s ease;
}

.form-group textarea {
    height: 110px;
    padding-top: 12px;
    resize: vertical;
}

.form-group select {
    appearance: auto;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--signal);
    box-shadow: 0 0 0 3px rgba(244, 83, 15, .14);
}

.form-group input.invalid {
    border-color: var(--error);
}

.form-error {
    color: var(--error);
    font-size: 12.5px;
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 14px;
}

.form-check input {
    width: 16px;
    height: 16px;
    margin-top: 4px;
    accent-color: var(--signal);
}

.form-check label a {
    color: var(--signal);
    font-weight: 600;
}

.form-check label a:hover {
    text-decoration: underline;
}

.form-check.error label {
    color: var(--error);
}

.form-privacy {
    font-size: 12px;
    line-height: 1.7;
    color: var(--text-muted);
    margin-top: 12px;
}

.form-submit {
    width: 100%;
    margin-top: 20px;
}

.form-success {
    display: none;
    background: rgba(28, 124, 77, .08);
    border: 1px solid rgba(28, 124, 77, .2);
    color: var(--success);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    font-size: 15px;
    font-weight: 600;
    margin-top: 22px;
}

.form-success.show {
    display: block;
}

@media (max-width: 575px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .modal-box {
        padding: 28px 22px;
    }
}

/* ===== Back to top ===== */
.back-top {
    position: fixed;
    right: 26px;
    bottom: 30px;
    width: 48px;
    height: 48px;
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--ink);
    border-radius: 50%;
    box-shadow: var(--shadow-1);
    z-index: 900;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s ease, background .2s;
}

.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    background: var(--signal);
    border-color: var(--signal);
    color: var(--ink);
}

/* roulang page: article */
:root{
  --ink:#16171A;
  --ink-2:#202226;
  --paper:#F4F2ED;
  --white:#FFFFFF;
  --signal:#F4530F;
  --signal-hover:#D8440C;
  --text-main:#1D1E20;
  --text-muted:#6D7077;
  --text-on-dark:#ECECE8;
  --line:rgba(22,23,26,0.12);
  --line-on-dark:rgba(255,255,255,0.14);
  --success:#1C7C4D;
  --error:#C03535;
  --radius:12px;
  --radius-sm:6px;
  --container:1240px;
  --gutter:24px;
  --shadow-sm:0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:0 2px 4px rgba(0,0,0,0.04), 0 18px 40px -20px rgba(0,0,0,0.14);
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  --font-condensed:"Bebas Neue","Oswald","DIN Alternate","Barlow Condensed","Arial Narrow","Roboto Condensed",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--white);
  color:var(--text-main);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{background:none;border:none;cursor:pointer}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.container{max-width:var(--container);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.skip-link{position:absolute;left:-999px;top:10px;z-index:2000;background:var(--ink);color:#fff;padding:10px 18px;border-radius:var(--radius-sm)}
.skip-link:focus{left:12px}

h1,h2,h3,h4{line-height:1.22;font-weight:800;color:var(--ink)}
.section-head{max-width:880px;margin-bottom:clamp(28px,4vw,46px)}
.section-head h2{font-size:clamp(28px,3.4vw,44px);letter-spacing:-0.01em}
.section-head p{color:var(--text-muted);margin-top:14px;font-size:17px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:52px;padding:0 28px;border-radius:var(--radius-sm);
  font-weight:600;font-size:15px;line-height:1;white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border .2s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--signal);color:var(--ink)}
.btn-primary:hover{background:var(--signal-hover);color:#fff}
.btn-secondary{background:var(--ink);color:#fff}
.btn-secondary:hover{background:var(--ink-2);box-shadow:var(--shadow-lg)}
.btn-ghost{border:1px solid rgba(255,255,255,0.5);color:#fff}
.btn-ghost:hover{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.btn-dark{background:var(--ink);color:#fff;min-height:52px}
.btn-dark:hover{background:var(--ink-2)}
.btn-dark span{transition:transform .2s ease}
.btn-dark:hover span{transform:translateX(3px)}
.btn-lg{min-height:58px;padding:0 38px;font-size:16px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink);border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.link-arrow svg{transition:transform .2s}
.link-arrow:hover{color:var(--signal)}
.link-arrow:hover svg{transform:translateX(3px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  border:1px solid var(--line);color:var(--text-muted);font-size:12px;font-weight:600;background:var(--white);
}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--signal);flex:none}

.site-header{
  position:sticky;top:0;left:0;right:0;z-index:1000;
  background:rgba(244,242,237,0.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background .25s ease;
  backdrop-filter:blur(8px);
}
.site-header.is-scrolled{box-shadow:0 8px 30px -18px rgba(0,0,0,0.2)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;position:relative;z-index:5}
.brand-logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}
.logo-mark{position:relative;width:34px;height:28px;flex:none}
.logo-mark i{position:absolute;display:block;background:var(--signal);border-radius:2px}
.logo-mark i:nth-child(1){width:9px;height:9px;left:1px;top:7px}
.logo-mark i:nth-child(2){width:13px;height:5px;left:10px;top:2px}
.logo-mark i:nth-child(3){width:17px;height:5px;left:14px;top:13px;background:var(--ink)}
.logo-mark i:nth-child(4){width:6px;height:6px;right:0;bottom:3px;background:var(--signal)}
.logo-text{font-size:20px;letter-spacing:-0.02em;display:inline-flex}
.logo-text span{font-weight:500;font-size:15px;margin-left:2px;align-self:flex-end}
.navbar{display:flex;align-items:center;gap:28px}
.navbar-links{display:flex;align-items:center;gap:10px}
.nav-link{
  display:inline-flex;align-items:center;color:var(--text-main);font-size:15px;font-weight:600;
  padding:8px 4px;position:relative;transition:color .2s;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-2px;width:22px;height:3px;border-radius:3px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--signal)}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{transform:scaleX(1)}
.burger{display:none;width:42px;height:42px;position:relative;z-index:1100;align-items:center;justify-content:center}
.burger span,.burger span::before,.burger span::after{width:26px;height:2px;background:var(--ink);border-radius:2px;position:relative;display:block;transition:all .25s ease}
.burger span::before,.burger span::after{content:"";position:absolute;left:0}
.burger span::before{top:-8px}
.burger span::after{top:8px}
.burger.is-open span{background:transparent}
.burger.is-open span::before{top:0;transform:rotate(45deg);background:#fff}
.burger.is-open span::after{top:0;transform:rotate(-45deg);background:#fff}

.article-hero{
  position:relative;background-color:var(--ink);background-image:linear-gradient(90deg,rgba(22,23,26,0.96) 0%,rgba(22,23,26,0.68) 52%,rgba(22,23,26,0.34) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;color:var(--text-on-dark);padding:88px 0 104px;
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb-nav{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,0.7);margin-bottom:30px}
.breadcrumb-nav a{color:rgba(255,255,255,0.75);transition:color .2s}
.breadcrumb-nav a:hover{color:var(--signal)}
.breadcrumb-nav span.sep{opacity:0.45}
.breadcrumb-nav .current{color:#fff;font-weight:600}
.article-title{max-width:960px;color:#fff;font-size:clamp(30px,4.4vw,52px);font-weight:900;letter-spacing:-0.02em;margin-top:10px;margin-bottom:18px}
.article-meta-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;color:rgba(255,255,255,0.75);font-size:14px}
.article-meta-bar .dot{width:4px;height:4px;border-radius:50%;background:var(--signal);display:inline-block}
.article-meta-item{display:inline-flex;align-items:center;gap:8px}

.article-body-wrap{background:var(--paper);padding:clamp(24px,4vw,56px) 0 72px}
.article-body-card{
  max-width:860px;margin:-64px auto 0;background:var(--white);
  border:1px solid rgba(22,23,26,0.08);border-radius:16px;
  padding:clamp(26px,5vw,60px);box-shadow:var(--shadow-lg);position:relative;z-index:3;
}
.article-entry{font-size:17px;line-height:1.9;color:var(--text-main);word-break:break-word}
.article-entry > * + *{margin-top:1.3em}
.article-entry p{line-height:1.9;margin:1.4em 0}
.article-entry h2{font-size:26px;margin:2em 0 0.75em;font-weight:800}
.article-entry h3{font-size:20px;margin:1.9em 0 0.6em;font-weight:750}
.article-entry h4{font-size:17px;font-weight:700;margin:1.6em 0 0.4em}
.article-entry strong{font-weight:700;color:var(--ink)}
.article-entry a{color:var(--ink);border-bottom:1px solid var(--signal)}
.article-entry a:hover{border-bottom-width:3px}
.article-entry ul,.article-entry ol{margin:1.2em 0;padding-left:1.4em}
.article-entry ul li{position:relative;margin:0.6em 0;padding-left:14px}
.article-entry ul li::before{content:"";position:absolute;left:0;top:0.75em;width:8px;height:2px;background:var(--signal)}
.article-entry ol{list-style:decimal}
.article-entry blockquote{margin:1.8em 0;padding:4px 0 4px 24px;border-left:4px solid var(--signal);color:var(--text-muted);font-size:17px}
.article-entry img{border-radius:12px;width:100%;height:auto;margin:26px 0}
.article-entry table{width:100%;border-collapse:collapse;font-size:15px;margin:1.8em 0}
.article-entry th,.article-entry td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-entry th{background:var(--paper);font-weight:700}
.article-entry hr{border:none;border-top:1px solid var(--line);margin:2.4em 0}
.article-entry code{background:var(--paper);padding:2px 8px;border-radius:4px;font-size:0.92em}

.article-bottom-nav{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:44px;padding-top:28px}
.article-bottom-nav .col-left,.article-bottom-nav .col-right{display:inline-flex;align-items:center;gap:8px}
.article-bottom-nav .back-link{color:var(--text-muted);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.article-bottom-nav .back-link:hover{color:var(--signal)}

.article-channel-section{padding:clamp(64px,8vw,100px) 0;background:var(--white)}
.article-channel-section .section-head p{font-size:17px}
.channel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.channel-card{
  display:grid;grid-template-columns:170px 1fr;gap:8px 26px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:20px 22px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(244,83,15,0.35)}
.channel-card .cover{width:170px;height:132px;border-radius:10px;overflow:hidden;background:var(--paper);grid-row:span 3}
.channel-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.channel-card:hover .cover img{transform:scale(1.04)}
.channel-card .tag{font-size:12px;font-weight:700;color:var(--signal);letter-spacing:0.03em}
.channel-card h3{font-size:23px;font-weight:800;margin:6px 0 4px;color:var(--ink)}
.channel-card h3 a:hover{color:var(--signal)}
.channel-card p{color:var(--text-muted);font-size:14px;line-height:1.7;margin-bottom:10px}
.channel-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px;margin-bottom:14px}
.channel-tags span{font-size:12px;color:var(--text-muted);border:1px solid var(--line);padding:3px 10px;border-radius:999px}
.channel-card .c-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink);transition:color .2s,gap .2s}
.channel-card .c-link:hover{color:var(--signal);gap:10px}

.article-cta{background:var(--signal);color:var(--ink)}
.article-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;padding-top:46px;padding-bottom:46px}
.article-cta h2{font-size:clamp(22px,3vw,32px);font-weight:900;color:var(--ink);line-height:1.25}
.article-cta p{color:rgba(22,23,26,0.78);margin-top:10px;font-size:15px;max-width:640px}
.article-cta .cta-actions{flex:none}

.no-article-section{padding:clamp(80px,9vw,130px) 0 74px;background:var(--paper)}
.no-article-card{max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:clamp(36px,6vw,78px) clamp(24px,5vw,60px);text-align:center;box-shadow:var(--shadow-lg)}
.no-article-card h1{font-size:clamp(30px,4vw,44px);font-weight:900;color:var(--ink)}
.no-article-card p{color:var(--text-muted);margin:16px auto 30px;max-width:520px}
.no-article-card .btn{min-width:160px}

.site-footer{background:var(--ink);color:var(--text-on-dark);padding-top:68px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.2fr 1.4fr;gap:48px 36px;padding-bottom:54px;border-bottom:1px solid rgba(255,255,255,0.1)}
.site-footer .brand-logo .logo-text{color:#fff}
.site-footer .brand-logo .logo-mark i:nth-child(3){background:#fff}
.footer-about p{color:rgba(255,255,255,0.58);font-size:15px;margin-top:18px;max-width:300px}
.footer-col-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:20px;letter-spacing:0.03em}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{color:rgba(255,255,255,0.6);font-size:14px;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--signal);padding-left:4px}
.footer-contact{color:rgba(255,255,255,0.6);font-style:normal;display:flex;flex-direction:column;gap:14px;font-size:14px}
.footer-contact span{line-height:1.7}
.footer-contact i{font-style:normal;display:inline-flex;align-items:center;justify-content:center;background:rgba(255,255,255,0.08);color:var(--signal);border-radius:4px;font-size:12px;padding:2px 8px;margin-right:8px;font-weight:600}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:22px 0 26px;color:rgba(255,255,255,0.4);font-size:13px}
.footer-bottom a{color:rgba(255,255,255,0.55)}
.footer-bottom a:hover{color:var(--signal)}

.modal{position:fixed;inset:0;z-index:2000;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(15,15,18,0.72);backdrop-filter:blur(6px)}
.modal.is-open{display:flex}
.modal-card{width:100%;max-width:640px;background:var(--white);border-radius:16px;box-shadow:0 30px 80px rgba(0,0,0,0.3);max-height:92vh;overflow-y:auto;padding:clamp(28px,5vw,46px);position:relative}
.modal-card.close-btn,.modal-close-ic{position:absolute;right:18px;top:18px;width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;font-size:28px;color:var(--text-muted);border-radius:50%;transition:background .2s,color .2s}
.modal-close-ic:hover{background:var(--paper);color:var(--ink)}
.modal-card h2{font-size:clamp(24px,3vw,32px);font-weight:900;color:var(--ink)}
.modal-subtitle{color:var(--text-muted);margin-top:12px;font-size:15px;line-height:1.7}
.form-grid{display:grid;gap:18px;margin-top:28px}
.form-item label{font-size:13px;font-weight:700;color:var(--ink);display:block;margin-bottom:7px}
.form-item label em{font-style:normal;color:var(--signal);margin-left:2px}
.form-item input,.form-item select,.form-item textarea{
  width:100%;height:50px;border:1px solid #C6C8CC;background:#fff;border-radius:var(--radius-sm);
  padding:0 16px;font-size:15px;color:var(--text-main);transition:border-color .2s,box-shadow .2s;
}
.form-item textarea{height:auto;min-height:96px;padding:12px 16px;resize:vertical}
.form-item input:focus,.form-item select:focus,.form-item textarea:focus{border-color:var(--signal);outline:none;box-shadow:0 0 0 3px rgba(244,83,15,0.12)}
.form-item .error-text{color:var(--error);font-size:13px;display:none;margin-top:6px}
.form-item.is-error input,.form-item.is-error select,.form-item.is-error textarea{border-color:var(--error)}
.form-item.is-error .error-text{display:block}
.form-check{display:flex;align-items:flex-start;gap:10px;margin-top:20px}
.form-check input{width:17px;height:17px;accent-color:var(--signal);margin-top:3px}
.form-check label{font-size:13px;color:var(--text-muted)}
.form-check label .policy-link{color:var(--signal);text-decoration:underline}
.form-check.is-error label{color:var(--error)}
.form-submit{margin-top:18px}
.form-submit button{width:100%}
.form-success{display:none;text-align:center;padding:34px 10px}
.form-success .success-icon{width:64px;height:64px;border-radius:50%;background:rgba(28,124,77,0.1);display:flex;align-items:center;justify-content:center;margin:0 auto 18px}
.form-success h3{font-size:24px;font-weight:900;color:var(--ink)}
.form-success p{color:var(--text-muted);margin-top:10px;font-size:15px}
.modal-privacy-note{font-size:12px;color:var(--text-muted);text-align:center;margin-top:18px}

@media(max-width:1200px){
  .container{--gutter:20px}
  .channel-grid{grid-template-columns:1fr 1fr;gap:20px}
  .channel-card{grid-template-columns:150px 1fr;padding:16px}
  .channel-card .cover{width:150px;height:120px}
}
@media(max-width:991px){
  .site-header{background:rgba(244,242,237,0.98)}
  .navbar{
    position:fixed;inset:0;background:rgba(22,23,26,0.99);backdrop-filter:blur(10px);
    display:flex;flex-direction:column;justify-content:center;align-items:stretch;
    padding:80px 40px 70px;transform:translateX(100%);visibility:hidden;
    transition:transform .3s ease,visibility .3s;z-index:1000;
  }
  .navbar.is-open{transform:translateX(0);visibility:visible}
  .navbar-links{flex-direction:column;align-items:flex-start;gap:0}
  .nav-link{color:rgba(255,255,255,0.8);font-size:28px;font-weight:700;padding:10px 0;width:100%;border-bottom:1px solid rgba(255,255,255,0.08)}
  .nav-link.is-active{color:#fff}
  .nav-link.is-active::after{left:0;bottom:6px;width:36px}
  .header-cta{margin-top:34px}
  .header-cta .btn{width:100%;min-height:56px;font-size:17px}
  .burger{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr;gap:38px 30px}
  .article-cta-inner{flex-direction:column;text-align:center}
  .article-cta p{margin-left:auto;margin-right:auto}
  .channel-grid{grid-template-columns:1fr;max-width:720px;margin:0 auto}
}
@media(max-width:767px){
  .article-meta-bar{gap:8px 14px}
  .article-body-wrap{padding-bottom:44px}
  .article-body-card{margin-top:-30px;padding:26px 20px}
  .channel-card{grid-template-columns:1fr}
  .channel-card .cover{width:100%;height:180px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{justify-content:center;text-align:center}
  .article-bottom-nav{align-items:flex-start;flex-direction:column}
  .article-hero{padding-top:60px;padding-bottom:90px}
  .article-title{font-size:28px}
  .modal{padding:14px}
}
@media(max-width:575px){
  body{font-size:15px}
  .container{--gutter:16px}
  .article-entry{font-size:16px}
  .article-entry h2{font-size:23px}
  .modal-card{padding:24px 18px}
  .channel-tags span{font-size:11px}
  .channel-card .cover{height:150px}
}

/* roulang page: category1 */
:root {
  --ink: #16171A;
  --ink-2: #202226;
  --ink-3: #2A2C31;
  --paper: #F4F2ED;
  --white: #FFFFFF;
  --signal: #F4530F;
  --signal-hover: #D8440C;
  --text-main: #1D1E20;
  --text-muted: #6D7077;
  --line: rgba(22, 23, 26, .12);
  --line-dark: rgba(255, 255, 255, .14);
  --success: #1C7C4D;
  --error: #C03535;
  --radius-card: 12px;
  --radius-btn: 6px;
  --radius-badge: 999px;
  --shadow-1: 0 2px 4px rgba(0, 0, 0, .04), 0 18px 40px -20px rgba(0, 0, 0, .14);
  --shadow-2: 0 4px 10px rgba(0, 0, 0, .05), 0 28px 56px -24px rgba(0, 0, 0, .22);
  --container: 1240px;
  --gutter: 24px;
  --header-h: 72px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  background: var(--white);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll { overflow: hidden; }
img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: 15px; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.section { padding: clamp(68px, 8vw, 108px) 0; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  background: var(--signal);
  flex: none;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all .24s ease;
  white-space: nowrap;
  border: 1px solid transparent;
  line-height: 1;
}
.btn svg { flex: none; transition: transform .24s ease; }
.btn-primary { background: var(--signal); color: var(--ink); }
.btn-primary:hover { background: var(--signal-hover); color: var(--ink); }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.btn-ghost:active { transform: translateY(1px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: var(--ink-2); color: #fff; }
.btn-dark:hover svg { transform: translateX(3px); }
.btn-dark:active { transform: translateY(1px); }
.btn-block { width: 100%; }

/* header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 100;
  background: linear-gradient(180deg, rgba(20,21,24,.55), rgba(20,21,24,0));
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled {
  background: rgba(244, 242, 237, .98);
  box-shadow: 0 8px 40px rgba(0,0,0,.08);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
}
.logo-mark {
  position: relative;
  width: 34px;
  height: 34px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 3px;
  transform: skewX(-8deg);
  flex: none;
}
.logo-mark i {
  display: block;
  background: var(--signal);
  border-radius: 2px;
}
.logo-mark i:nth-child(1) { background: var(--signal); }
.logo-mark i:nth-child(2) { background: #fff; }
.logo-mark i:nth-child(3) { background: #fff; }
.logo-mark i:nth-child(4) { background: var(--signal); }
.site-header.is-scrolled .logo-mark i:nth-child(2) { background: var(--ink); }
.site-header.is-scrolled .logo-mark i:nth-child(3) { background: var(--ink); }
.logo-text {
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -.01em;
  transition: color .3s ease;
}
.logo-text span { color: var(--signal); }
.site-header.is-scrolled .logo-text { color: var(--ink); }

.navbar {
  display: flex;
  align-items: center;
  gap: 30px;
}
.navbar-links {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 500;
  padding: 20px 0 14px;
  color: rgba(255,255,255,.9);
  transition: color .25s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 6px;
  height: 3px;
  border-radius: 99px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s ease;
}
.nav-link:hover,
.site-header.is-scrolled .nav-link { color: var(--ink); }
.site-header:not(.is-scrolled) .nav-link:hover { color: #fff; }
.nav-link:hover::after,
.nav-link.is-active::after { transform: scaleX(1); }
.nav-link.is-active { font-weight: 700; color: var(--text-main); }
.site-header:not(.is-scrolled) .nav-link.is-active { color: #fff; }
.site-header.is-scrolled .nav-link { color: var(--text-main); }

.header-cta .btn { height: 44px; padding: 0 22px; font-size: 14px; }

.burger {
  display: none;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 150;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.burger span,
.burger::before,
.burger::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 3px;
  transition: all .3s ease;
}
.site-header.is-scrolled .burger span,
.site-header.is-scrolled .burger::before,
.site-header.is-scrolled .burger::after { background: var(--ink); }
.burger.is-open span { opacity: 0; transform: translateX(-6px); }
.burger.is-open::before { transform: translateY(7px) rotate(45deg); background: #fff; }
.burger.is-open::after { transform: translateY(-7px) rotate(-45deg); background: #fff; }
.site-header.mobile-open {
  background: rgba(22, 23, 26, .98);
  box-shadow: none;
  border-bottom: none;
  height: 100vh;
  align-items: flex-start;
  transition: background .3s;
}
.site-header.mobile-open .header-inner {
  flex-wrap: wrap;
  align-content: flex-start;
  padding-top: 18px;
  height: 100%;
}
.site-header.mobile-open .logo-text { color: #fff; }
.site-header.mobile-open .logo-mark i:nth-child(2),
.site-header.mobile-open .logo-mark i:nth-child(3) { background: #fff; }

/* category hero */
.cat-hero {
  position: relative;
  min-height: 610px;
  background: var(--ink);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.cat-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center 30%;
  opacity: .55;
}
.cat-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(22,23,26,.94) 0%, rgba(22,23,26,.7) 45%, rgba(22,23,26,.25) 100%);
}
.cat-hero-inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(150px, 20vh, 190px);
  padding-bottom: 64px;
}
.cat-hero .eyebrow { color: rgba(255,255,255,.8); }
.cat-hero .eyebrow::before { background: var(--signal); }
.cat-hero h1 {
  max-width: 760px;
  color: #fff;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -.02em;
  margin-bottom: 24px;
}
.cat-hero h1 em {
  font-style: normal;
  color: var(--signal);
}
.cat-hero-desc {
  max-width: 650px;
  color: rgba(255,255,255,.78);
  font-size: 17px;
  line-height: 1.9;
  margin-bottom: 36px;
}
.cat-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 48px;
}
.crumb-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.66);
  margin-bottom: 18px;
}
.crumb-row a { color: rgba(255,255,255,.9); }
.crumb-row a:hover { color: var(--signal); }
.crumb-row span { color: rgba(255,255,255,.6); }
.crumb-row i { font-style: normal; color: var(--signal); }

.anchor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
}
.anchor-row a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,.4);
  transition: border-color .25s;
}
.anchor-row a::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--signal);
  flex: none;
  transform: rotate(45deg);
}
.anchor-row a:hover { border-color: var(--signal); }

/* section headings */
.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head .eyebrow { color: var(--signal); }
.section-head .eyebrow::before { background: var(--signal); }
.section-head h2 {
  font-size: clamp(27px, 4vw, 42px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--ink);
  margin: 12px 0 16px;
  letter-spacing: -.01em;
}
.section-head p {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.8;
}

/* split content */
.split-feature {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 60px;
  align-items: center;
  margin-bottom: clamp(56px, 8vw, 92px);
}
.split-feature:last-child { margin-bottom: 0; }
.split-feature.split-reverse .split-media { order: 1; }
.split-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  aspect-ratio: 4/3;
}
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.split-media:hover img { transform: scale(1.03); }
.split-media::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 35%;
  background: linear-gradient(0deg, rgba(22,23,26,.18), transparent);
}
.split-media-tag {
  position: absolute;
  z-index: 2;
  left: 18px;
  bottom: 18px;
  background: rgba(22,23,26,.78);
  color: #fff;
  backdrop-filter: blur(4px);
  border-radius: var(--radius-badge);
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
}
.split-content h3 {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
  margin: 14px 0 16px;
}
.split-content > p {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 18px;
}
.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--text-main);
  padding: 8px 0;
  font-size: 15px;
}
.check-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: none;
  margin-top: 9px;
  background: var(--signal);
  border-radius: 2px;
  transform: rotate(45deg);
}
.check-list strong { font-weight: 700; }

/* material / facility band */
.material-band { background: var(--paper); }
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.tech-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 32px 24px 28px;
  transition: box-shadow .3s ease, transform .3s ease;
}
.tech-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}
.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(244, 83, 15, .1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--signal);
  margin-bottom: 22px;
}
.card-icon svg { width: 28px; height: 28px; }
.tech-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 10px;
}
.tech-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.spark-line {
  display: flex;
  gap: 5px;
  align-items: center;
}
.spark-line i {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--signal);
  display: inline-block;
}
.spark-line b {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: .03em;
}

/* venue types */
.venue-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.venue-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--ink);
  min-height: 340px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow-1);
  transition: transform .3s ease, box-shadow .3s ease;
}
.venue-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-2); }
.venue-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .6;
  transition: transform .55s ease, opacity .3s ease;
}
.venue-card:hover img { transform: scale(1.05); opacity: .5; }
.venue-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(22,23,26,.86), transparent 60%);
}
.venue-info {
  position: relative;
  z-index: 2;
  padding: 26px;
  width: 100%;
}
.venue-no {
  font-family: "Barlow Condensed", "Oswald", "DIN Alternate", "Arial Narrow", sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--signal);
  display: block;
  margin-bottom: 8px;
}
.venue-info h3 { color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.venue-info p { color: rgba(255,255,255,.76); font-size: 13px; line-height: 1.7; }

/* process section on dark */
.process-section {
  background: var(--ink);
  color: #fff;
  position: relative;
}
.process-section .section-head h2 { color: #fff; }
.process-section .section-head p { color: rgba(255,255,255,.66); }
.process-section .section-head .eyebrow { color: rgba(255,255,255,.7); }
.process-section .section-head .eyebrow::before { background: var(--signal); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
.process-step {
  border-top: 2px solid rgba(255,255,255,.2);
  padding-top: 22px;
  position: relative;
}
.process-step::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 22px;
  height: 4px;
  background: var(--signal);
  border-radius: 3px;
}
.process-no {
  display: block;
  font-family: "Barlow Condensed", "Oswald", "DIN Alternate", "Arial Narrow", sans-serif;
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  margin-bottom: 18px;
}
.process-step h3 { font-size: 19px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.process-step p { font-size: 14px; color: rgba(255,255,255,.65); line-height: 1.8; }

.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 34px 0;
  border-top: 1px solid rgba(255,255,255,.1);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.metric-item { text-align: center; }
.metric-line {
  width: 22px;
  height: 3px;
  background: var(--signal);
  border-radius: 3px;
  margin: 0 auto 16px;
}
.metric-num {
  display: block;
  font-family: "Barlow Condensed", "Oswald", "DIN Alternate", "Arial Narrow", sans-serif;
  font-size: clamp(42px, 5vw, 68px);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}
.metric-num small {
  font-size: 22px;
  color: var(--signal);
  margin-left: 2px;
  font-weight: 600;
}
.metric-label { display: block; margin-top: 12px; font-size: 14px; color: rgba(255,255,255,.65); }

/* faq */
.faq-section { background: var(--paper); }
.faq-inner {
  max-width: 880px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item:first-of-type { border-top: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  text-align: left;
  padding: 22px 4px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}
.faq-q:hover .faq-q-text { color: var(--signal); transition: color .2s; }
.faq-q-text { display: block; }
.faq-plus {
  flex: none;
  position: relative;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: transform .3s ease, background .3s ease;
}
.faq-plus::before,
.faq-plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  background: var(--ink);
  border-radius: 2px;
  width: 12px;
  height: 2px;
  transition: all .3s ease;
}
.faq-plus::after { transform: rotate(90deg); }
.faq-item.is-open .faq-plus { transform: rotate(135deg); background: var(--ink); border-color: var(--ink); }
.faq-item.is-open .faq-plus::before,
.faq-item.is-open .faq-plus::after { background: #fff; }
.faq-a {
  overflow: hidden;
  max-height: 0;
  padding: 0 40px 0 4px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.85;
  transition: max-height .4s ease, padding .4s ease;
}
.faq-a p { padding-bottom: 22px; }

/* final cta */
.final-cta {
  background: var(--signal);
  padding: clamp(48px, 6vw, 76px) 0;
}
.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-box .eyebrow { color: rgba(22,23,26,.7); }
.cta-box .eyebrow::before { background: var(--ink); }
.cta-box h2 {
  color: var(--ink);
  font-size: clamp(26px, 4vw, 40px);
  max-width: 520px;
  font-weight: 900;
  line-height: 1.2;
  margin-top: 8px;
}
.cta-box p { color: rgba(22,23,26,.72); font-size: 16px; margin-top: 14px; max-width: 560px; }

/* footer */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,.7);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1.3fr;
  gap: 48px 36px;
  padding-bottom: 52px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-about p { font-size: 14px; line-height: 1.9; margin-top: 20px; max-width: 280px; color: rgba(255,255,255,.6); }
.footer-col-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: .03em;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  transition: color .2s;
}
.footer-links a:hover { color: var(--signal); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-style: normal;
  font-size: 13px;
  color: rgba(255,255,255,.5);
  line-height: 1.65;
}
.footer-contact span { display: flex; gap: 10px; }
.footer-contact i {
  flex: none;
  font-style: normal;
  background: rgba(244,83,15,.18);
  color: var(--signal);
  border-radius: 4px;
  height: 22px;
  padding: 0 8px;
  font-size: 12px;
  font-weight: 600;
  line-height: 22px;
  letter-spacing: .02em;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 28px 0;
  font-size: 13px;
  color: rgba(255,255,255,.35);
}
.footer-bottom span:last-child { font-family: "SFMono-Regular", Consolas, monospace; }
.site-footer .brand-logo .logo-text { color: #fff; }

/* modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal.is-open { display: flex; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15,15,18,.72);
  backdrop-filter: blur(6px);
}
.modal-panel {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 620px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  background: var(--white);
  border-radius: 14px;
  padding: clamp(28px, 5vw, 44px);
  box-shadow: var(--shadow-2);
}
.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all .2s ease;
}
.modal-close:hover { background: var(--paper); color: var(--ink); }
.modal-panel h2 {
  font-size: 28px;
  color: var(--ink);
  font-weight: 900;
  margin: 8px 0 12px;
}
.modal-panel .modal-desc { color: var(--text-muted); font-size: 15px; line-height: 1.75; margin-bottom: 28px; }
.form-row { margin-bottom: 20px; }
.form-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  height: 48px;
  border: 1px solid #C6C8CC;
  border-radius: var(--radius-btn);
  padding: 0 14px;
  background: #fff;
  color: var(--text-main);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-row textarea { height: 100px; padding: 12px 14px; resize: vertical; min-height: 84px; }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(244,83,15,.12);
}
.form-row.has-error input,
.form-row.has-error select,
.form-row.has-error textarea { border-color: var(--error); }
.form-error { font-size: 12px; color: var(--error); margin-top: 5px; display: none; }
.has-error .form-error { display: block; }
.check-wrap {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--text-muted);
}
.check-wrap input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--signal);
  flex: none;
}
.check-wrap.has-error { color: var(--error); }
.check-wrap.has-error input { outline: 1px solid var(--error); border-radius: 3px; }
.check-wrap a { text-decoration: underline; }
.check-wrap a:hover { color: var(--signal); }
.form-success {
  display: none;
  text-align: center;
  padding: 50px 20px;
}
.form-success.is-show { display: block; }
.success-mark {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: rgba(28,124,77,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success);
}
.success-mark svg { width: 32px; height: 32px; }
.form-success h3 { font-size: 22px; color: var(--ink); font-weight: 800; margin-bottom: 10px; }
.form-success p { color: var(--text-muted); font-size: 15px; }
.agree-error-hint { color: var(--error); font-size: 12px; display: none; }
.agree-error-hint.show { display: block; margin-top: -12px; margin-bottom: 14px; }

/* responsive */
@media (max-width: 1199px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 991px) {
  .navbar {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: var(--ink);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s ease, visibility .3s ease;
  }
  .navbar-links {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
  .nav-link {
    color: rgba(255,255,255,.92);
    font-size: 26px;
    font-weight: 700;
    padding: 16px;
  }
  .nav-link::after { display: none; }
  .nav-link.is-active { color: var(--signal); }
  .site-header.mobile-open .navbar { opacity: 1; visibility: visible; }
  .header-cta { margin-top: 40px; }
  .header-cta .btn { height: 52px; padding: 0 34px; background: var(--signal); color: var(--ink); }
  .burger { display: inline-flex; }
  .split-feature { grid-template-columns: 1fr; gap: 32px; }
  .split-feature.split-reverse .split-media { order: 0; }
  .venue-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .metrics-row { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  :root { --gutter: 20px; }
  .tech-grid { grid-template-columns: 1fr; }
  .venue-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; row-gap: 30px; }
  .metrics-row { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 30px; }
  .footer-bottom { justify-content: center; flex-direction: column; padding: 22px 0; }
  .cat-hero-actions .btn { flex: 1; min-width: 150px; }
  .final-cta .cta-box { justify-content: center; text-align: center; }
  .cta-box .eyebrow { justify-content: center; }
  .cta-box h2 { margin-left: auto; margin-right: auto; }
  .header-cta .btn { width: 100%; }
}
@media (max-width: 575px) {
  :root { --gutter: 16px; }
  .section { padding: 54px 0; }
  .cat-hero { min-height: 520px; }
  .cat-hero h1 { font-size: 30px; }
  .cat-hero { align-items: flex-end; }
  .cat-hero-inner { padding-bottom: 48px; }
  .anchor-row { gap: 8px 16px; }
  .anchor-row a { font-size: 13px; }
  .venue-grid { grid-template-columns: 1fr; }
  .metrics-row { grid-template-columns: 1fr 1fr; gap: 16px; padding: 26px 0; }
  .metric-num { font-size: 40px; }
  .metric-label { font-size: 12px; }
  .modal-panel { padding: 24px 20px; }
  .modal-panel h2 { font-size: 23px; }
}

/* roulang page: category2 */
:root {
  --ink: #16171A;
  --ink-2: #202226;
  --paper: #F4F2ED;
  --white: #FFFFFF;
  --signal: #F4530F;
  --signal-hover: #D8440C;
  --text-main: #1D1E20;
  --text-muted: #6D7077;
  --text-on-dark: #ECECE8;
  --line: rgba(22, 23, 26, 0.12);
  --line-dark: rgba(255, 255, 255, 0.14);
  --radius: 12px;
  --radius-sm: 6px;
  --shadow-1: 0 2px 4px rgba(0, 0, 0, 0.04), 0 18px 40px -20px rgba(0, 0, 0, 0.14);
  --shadow-2: 0 14px 28px -16px rgba(22, 23, 26, 0.28), 0 4px 10px rgba(22, 23, 26, 0.06);
  --container: 1240px;
  --font-body: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-display: "Barlow Condensed", "Oswald", "DIN Alternate", "Arial Narrow", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--white);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(244, 83, 15, 0.2);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.section {
  padding: clamp(64px, 7vw, 100px) 0;
}

.section-paper {
  background: var(--paper);
}

.section-white {
  background: var(--white);
}

.section-dark {
  background: var(--ink);
  color: var(--text-on-dark);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--signal);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 3px;
  background: var(--signal);
  flex: none;
}

.sec-head {
  max-width: 900px;
  margin-bottom: 44px;
}

.sec-head.is-center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.sec-title {
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin: 18px 0 14px;
  color: var(--text-main);
}

.sec-sub {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 720px;
}

.sec-head.is-center .sec-sub {
  margin-left: auto;
  margin-right: auto;
}

.section-dark .sec-title {
  color: var(--text-on-dark);
}

.section-dark .sec-sub {
  color: rgba(236, 236, 232, 0.72);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 26px;
  border: 0;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--signal);
  color: var(--ink);
}

.btn-primary:hover {
  background: var(--signal-hover);
  color: var(--ink);
}

.btn-secondary {
  background: var(--ink);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--ink-2);
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn-ghost:hover {
  background: var(--signal);
  border-color: transparent;
  color: var(--ink);
}

.btn-dark {
  background: var(--ink);
  color: #fff;
}

.btn-dark:hover {
  background: var(--ink-2);
  color: #fff;
}

.btn-dark:hover .arrow {
  transform: translateX(4px);
}

.arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

.btn-block {
  width: 100%;
}

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(22, 23, 26, 0.55) 0%, rgba(22, 23, 26, 0) 100%);
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  position: fixed;
  background: rgba(22, 23, 26, 0.96);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

body.nav-open {
  overflow: hidden;
}

body.nav-open .site-header {
  background: var(--ink);
  position: fixed;
}

.header-inner {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.logo-mark {
  display: grid;
  grid-template-columns: 5px 5px 5px 5px;
  grid-template-rows: 13px 13px 13px 13px;
  gap: 3px;
  width: 30px;
  height: 30px;
  align-items: end;
  justify-content: center;
  background: var(--ink);
  border-radius: 4px;
  padding: 4px;
}

.logo-mark i {
  display: block;
  background: var(--signal);
  border-radius: 1px;
}

.logo-mark i:nth-child(1) {
  height: 100%;
  background: #fff;
}

.logo-mark i:nth-child(2) {
  height: 82%;
}

.logo-mark i:nth-child(3) {
  height: 100%;
  background: #fff;
}

.logo-mark i:nth-child(4) {
  height: 64%;
}

.logo-text {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #fff;
  white-space: nowrap;
}

.logo-text span {
  color: var(--signal);
  font-weight: 700;
  font-size: 19px;
  margin-left: -2px;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  flex: 1;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-on-dark);
  opacity: 0.84;
  padding: 8px 0;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 22px;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.nav-link:hover,
.nav-link.is-active {
  opacity: 1;
  color: #fff;
}

.nav-link.is-active::after,
.nav-link:hover::after {
  transform: scaleX(1);
}

.header-cta {
  flex: none;
}

.header-cta .btn {
  height: 42px;
  padding: 0 22px;
  font-size: 14px;
}

.burger {
  display: none;
  position: relative;
  z-index: 160;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius-sm);
  background: transparent;
  align-items: center;
  justify-content: center;
}

.burger span,
.burger::before,
.burger::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  position: absolute;
  left: 11px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.burger span {
  top: 20px;
}

.burger::before {
  top: 13px;
}

.burger::after {
  top: 27px;
}

body.nav-open .burger span {
  opacity: 0;
}

body.nav-open .burger::before {
  transform: rotate(45deg);
  top: 21px;
}

body.nav-open .burger::after {
  transform: rotate(-45deg);
  top: 21px;
}

/* Hero / Page banner */
.page-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 620px;
  padding: 148px 0 92px;
  color: #fff;
  background:
    linear-gradient(100deg, rgba(22, 23, 26, 0.95) 0%, rgba(22, 23, 26, 0.82) 40%, rgba(22, 23, 26, 0.34) 100%),
    url("/assets/images/backpic/back-2.webp") no-repeat center center / cover;
  isolation: isolate;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, transparent, transparent calc(25% - 1px), rgba(255, 255, 255, 0.04) calc(25% - 1px), rgba(255, 255, 255, 0.04) 25%);
  z-index: -1;
}

.page-hero::after {
  content: "";
  position: absolute;
  right: 7%;
  bottom: 0;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 50%;
  z-index: -1;
}

.page-hero.is-home {
  min-height: 720px;
}

.hero-content {
  max-width: 850px;
}

.hero-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 26px;
}

.hero-crumb a {
  color: rgba(255, 255, 255, 0.86);
  transition: color 0.2s ease;
}

.hero-crumb a:hover {
  color: var(--signal);
}

.hero-kicker {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #FF9A62;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
}

.hero-kicker::before {
  content: "";
  width: 30px;
  height: 3px;
  background: var(--signal);
}

.page-hero h1 {
  font-size: clamp(30px, 4.6vw, 58px);
  font-weight: 900;
  line-height: 1.18;
  margin: 0 0 22px;
  color: #fff;
  letter-spacing: -0.025em;
}

.hero-lead {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 680px;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 38px;
}

.hero-anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-anchors a {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.84);
  transition: color 0.2s ease;
}

.hero-anchors a::before {
  content: "";
  width: 12px;
  height: 2px;
  background: var(--signal);
  margin-right: 8px;
}

.hero-anchors a:hover {
  color: #fff;
}

/* Scope split */
.split-block {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.split-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
}

.split-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.split-media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 80px;
  background: linear-gradient(0deg, rgba(22, 23, 26, 0.35), transparent);
  pointer-events: none;
}

.split-content h2 {
  margin-top: 16px;
}

.split-copy {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 24px;
}

.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.value-list li {
  position: relative;
  padding: 10px 0 10px 28px;
  font-size: 15px;
  color: var(--text-main);
  border-bottom: 1px solid var(--line);
}

.value-list li:last-child {
  border-bottom: 0;
}

.value-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 14px;
  height: 2px;
  background: var(--signal);
}

/* Equipment product grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-color: rgba(22, 23, 26, 0.2);
}

.product-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #E1DED7;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-media img {
  transform: scale(1.03);
}

.product-body {
  padding: 20px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.product-body h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-main);
}

.product-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--signal);
  border-radius: 50%;
}

/* Spec coverage rows */
.spec-list {
  max-width: 100%;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: 200px 1fr 260px;
  gap: 30px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.spec-title {
  font-size: 18px;
  font-weight: 900;
  line-height: 1.4;
  color: var(--text-main);
  padding-top: 2px;
}

.spec-desc {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.spec-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.spec-tags li {
  padding: 5px 11px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

/* Process */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 36px;
}

.process-step {
  position: relative;
  border-left: 1px solid var(--line-dark);
  padding: 0 0 0 28px;
}

.process-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(244, 83, 15, 0.2);
}

.step-num {
  display: block;
  font-family: var(--font-display);
  font-size: 31px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--signal);
  line-height: 1;
  margin-bottom: 8px;
}

.process-step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: #fff;
  font-weight: 800;
}

.process-step p {
  margin: 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

/* Coverage and support strip */
.guarantee-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.guarantee-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guarantee-list li {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
}

.guarantee-num {
  flex: none;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--ink);
  background: var(--signal);
  border-radius: 8px;
}

.guarantee-list h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
}

.guarantee-list p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.guarantee-note {
  background: var(--ink);
  color: var(--text-on-dark);
  border-radius: 16px;
  padding: 30px;
  position: relative;
  overflow: hidden;
}

.guarantee-note::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.guarantee-note h3 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 20px;
}

.guarantee-note p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.8;
}

/* FAQ */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  border-top: 1px solid var(--line);
}

.faq-item:last-child {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  padding: 14px 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  transition: color 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--signal-hover);
}

.faq-icon {
  position: relative;
  flex: none;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 50%;
  margin-left: 16px;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2px;
  background: var(--text-main);
  transform: translate(-50%, -50%);
  transition: transform 0.2s ease;
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item[open] .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0);
}

.faq-answer {
  padding: 0 4px 20px;
  color: var(--text-muted);
  font-size: 15px;
  max-width: 780px;
}

/* CTA band */
.cta-band {
  background: var(--signal);
  color: var(--ink);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 42px 48px;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 220px;
  height: 220px;
  border: 26px solid rgba(22, 23, 26, 0.08);
  border-radius: 50%;
}

.cta-copy h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  line-height: 1.25;
}

.cta-copy p {
  margin: 0;
  color: rgba(22, 23, 26, 0.76);
  font-size: 15px;
  max-width: 700px;
}

.cta-action {
  flex: none;
  position: relative;
  z-index: 2;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 18, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 300;
  display: none;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
  padding: 48px 20px 80px;
}

.modal-overlay.is-open {
  display: flex;
}

.modal-panel {
  width: 100%;
  max-width: 620px;
  background: #fff;
  border-radius: 14px;
  padding: 36px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
  position: relative;
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.modal-close:hover {
  background: var(--ink);
  color: #fff;
  transform: rotate(90deg);
}

.modal-title {
  margin: 0 0 8px;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.3;
}

.modal-lead {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 0 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-label .req {
  color: var(--signal);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  height: 46px;
  border: 1px solid #C6C8CC;
  border-radius: var(--radius-sm);
  padding: 0 14px;
  font-size: 14px;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group textarea {
  height: 108px;
  padding: 12px 14px;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(244, 83, 15, 0.14);
}

.form-group input.has-error,
.form-group select.has-error,
.form-group textarea.has-error {
  border-color: var(--error);
}

.error-text {
  color: var(--error);
  font-size: 12px;
  margin-top: 4px;
  min-height: 16px;
  display: none;
}

.error-text.show {
  display: block;
}

.form-privacy {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--text-muted);
  margin: 6px 0 16px;
}

.form-privacy input {
  margin-top: 4px;
}

.form-privacy a {
  color: var(--signal-hover);
  font-weight: 600;
}

.privacy-check.has-error {
  color: var(--error);
}

.form-message {
  padding: 20px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: none;
}

.form-message.show {
  display: block;
}

.form-success {
  display: none;
  text-align: center;
  padding: 24px 0 16px;
}

.form-success .success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(28, 124, 77, 0.12);
  color: var(--success);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 16px;
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.72);
  padding: 64px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 44px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.footer-about p {
  margin: 18px 0 0;
  max-width: 280px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.62);
}

.footer-col-title {
  font-weight: 800;
  font-size: 15px;
  color: #fff;
  margin: 6px 0 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-links a:hover {
  color: var(--signal);
  transform: translateX(3px);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
  font-style: normal;
  color: rgba(255, 255, 255, 0.68);
}

.footer-contact span {
  display: flex;
  align-items: flex-start;
}

.footer-contact i {
  display: inline-flex;
  min-width: 44px;
  font-style: normal;
  color: #fff;
  font-weight: 700;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

section[id],
.split-block[id] {
  scroll-margin-top: 80px;
}

/* Responsive */
@media (max-width: 1279px) {
  .container {
    padding: 0 20px;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}

@media (max-width: 991px) {
  .header-inner {
    height: 68px;
  }

  .burger {
    display: inline-flex;
  }

  .navbar {
    position: fixed;
    inset: 0;
    background: var(--ink);
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    padding: 80px 32px 48px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 150;
    opacity: 1;
  }

  body.nav-open .navbar {
    transform: none;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.4);
  }

  .navbar-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
  }

  .navbar .nav-link {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
  }

  .header-cta {
    margin-top: 26px;
  }

  .header-cta .btn {
    width: 100%;
    height: 52px;
  }

  .split-block,
  .guarantee-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .split-media img {
    height: 330px;
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 38px;
  }

  .spec-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 767px) {
  .page-hero {
    min-height: 560px;
    padding: 130px 0 70px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .guarantee-list li {
    flex-direction: column;
    gap: 12px;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
    padding: 30px 26px;
  }

  .cta-action .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
  }

  .footer-about {
    grid-column: 1 / -1;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal-panel {
    padding: 28px 20px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .page-hero {
    min-height: 540px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-about {
    grid-column: auto;
  }

  .product-grid {
    gap: 14px;
  }

  .split-media img {
    height: 230px;
  }
}