:root {
    --bg: #f8f5ef;
    --panel: #ffffff;
    --panel-soft: rgba(255, 255, 255, .72);
    --ink: #242321;
    --muted: #73706a;
    --line: rgba(36, 35, 33, .12);
    --accent: #2f2c28;
    --accent-soft: #e9dfcf;
    --radius: 28px;
    --shadow: 0 24px 70px rgba(45, 41, 34, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 10% 0%, rgba(232, 220, 199, .42), transparent 34rem),
        linear-gradient(180deg, #fbf8f2 0%, var(--bg) 52%, #f3efe7 100%);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.72;
    letter-spacing: .01em;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(22px);
    background: rgba(248, 245, 239, .82);
    border-bottom: 1px solid var(--line);
}
.nav-shell {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto;
    min-height: 82px;
    display: flex;
    align-items: center;
    gap: 28px;
}
.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    letter-spacing: .06em;
}
.brand-mark img {
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(43, 38, 31, .12);
}
.main-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 20px;
    color: var(--muted);
    font-size: 15px;
}
.main-nav a {
    position: relative;
    padding: 9px 0;
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 3px;
    width: 0;
    height: 1px;
    background: var(--ink);
    transition: width .24s ease;
}
.main-nav a:hover::after,
.main-nav a.is-active::after { width: 100%; }
.main-nav a.is-active { color: var(--ink); }
.nav-cta, .button, .search-shell button {
    border: 1px solid var(--ink);
    border-radius: 999px;
    padding: 11px 18px;
    line-height: 1;
    transition: transform .24s ease, background .24s ease, color .24s ease;
}
.nav-cta:hover, .button:hover, .search-shell button:hover {
    transform: translateY(-2px);
}
.search-shell {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto 16px;
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 12px;
    align-items: center;
}
.search-shell input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,.72);
    padding: 13px 18px;
    outline: none;
}
.search-shell input:focus {
    border-color: rgba(36,35,33,.32);
    box-shadow: 0 0 0 4px rgba(47,44,40,.07);
}
.search-shell button {
    background: var(--ink);
    color: #fff;
    cursor: pointer;
}
.domain-pill {
    color: var(--muted);
    font-size: 13px;
    white-space: nowrap;
}
.search-note {
    grid-column: 1 / -1;
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    min-height: 22px;
}
.hero {
    width: min(1180px, calc(100% - 36px));
    min-height: calc(100svh - 140px);
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(360px, 1fr);
    gap: 56px;
    align-items: center;
    padding: 74px 0;
}
.hero h1, .page-hero h1 {
    margin: 0;
    font-size: clamp(42px, 7vw, 86px);
    line-height: .98;
    letter-spacing: -.07em;
    max-width: 920px;
}
.hero-lead, .page-hero p {
    margin: 26px 0 0;
    color: var(--muted);
    font-size: clamp(17px, 2vw, 20px);
    max-width: 720px;
}
.eyebrow {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .2em;
    text-transform: uppercase;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}
.button.primary {
    background: var(--ink);
    color: #fff;
}
.button.secondary {
    background: rgba(255,255,255,.4);
}
.trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}
.trust-row span, .tag-row span, .share-row span {
    display: inline-flex;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 7px 12px;
    color: var(--muted);
    background: rgba(255,255,255,.5);
    font-size: 13px;
}
.hero-media, .wide-figure, .case-card figure, .video-frame {
    margin: 0;
}
.hero-media img, .wide-figure img {
    border-radius: clamp(28px, 5vw, 56px);
    box-shadow: var(--shadow);
}
figcaption {
    color: var(--muted);
    font-size: 12px;
    margin-top: 10px;
}
.section {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto;
    padding: 96px 0;
}
.section.compact { padding: 66px 0; }
.section.muted {
    width: 100%;
    max-width: none;
    padding-inline: max(18px, calc((100% - 1180px)/2));
    background: rgba(255,255,255,.46);
    border-block: 1px solid var(--line);
}
.section.split {
    display: grid;
    grid-template-columns: .8fr 1fr;
    gap: 72px;
}
.section-head h2 {
    margin: 0;
    font-size: clamp(30px, 4.2vw, 56px);
    line-height: 1.08;
    letter-spacing: -.05em;
}
.section-head p:not(.eyebrow), .split-copy p {
    color: var(--muted);
    margin: 18px 0 0;
}
.card-grid, .video-grid, .case-grid, .testimonial-grid, .mini-grid, .stats-grid {
    display: grid;
    gap: 20px;
    margin-top: 34px;
}
.card-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.video-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.case-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.testimonial-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mini-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stats-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.soft-card, .video-card, .case-card, .testimonial, .mini-card, .contact-form, .step-list article {
    background: var(--panel-soft);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.soft-card, .testimonial, .mini-card, .step-list article {
    padding: 28px;
}
.soft-card h3, .soft-card h2, .video-card h3, .case-card h3, .case-card h2, .mini-card h3, .step-list h2 {
    margin: 8px 0 0;
    line-height: 1.24;
}
.soft-card p, .video-card p, .case-card p, .testimonial span, .mini-card p, .step-list p {
    color: var(--muted);
}
.card-index, .step-list article span {
    display: inline-flex;
    color: var(--muted);
    font-weight: 800;
    letter-spacing: .18em;
}
.video-card {
    overflow: hidden;
    transition: transform .26s ease, box-shadow .26s ease;
}
.video-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 34px 90px rgba(45, 41, 34, .12);
}
.video-frame {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: #ede8df;
}
.mock-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.play-button {
    position: absolute;
    inset: 50% auto auto 50%;
    transform: translate(-50%, -50%) scale(.92);
    width: 74px;
    height: 74px;
    border: 0;
    border-radius: 50%;
    background: rgba(36,35,33,.88);
    color: #fff;
    opacity: 0;
    cursor: pointer;
    transition: opacity .24s ease, transform .24s ease;
}
.video-card:hover .play-button,
.video-card:focus-within .play-button {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}
.video-frame figcaption {
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 14px;
    margin: 0;
    color: rgba(255,255,255,.86);
    text-shadow: 0 1px 8px rgba(0,0,0,.28);
}
.video-body {
    padding: 24px;
}
.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0;
    color: var(--muted);
    font-size: 13px;
}
.video-meta span {
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(47,44,40,.06);
}
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag-row.large {
    margin-top: 24px;
}
.case-card {
    overflow: hidden;
}
.case-card img {
    aspect-ratio: 16 / 10;
    object-fit: cover;
}
.case-card div {
    padding: 24px;
}
.stats {
    border-block: 1px solid var(--line);
}
.stats-grid div {
    padding: 32px;
    border-right: 1px solid var(--line);
}
.stats-grid strong {
    display: block;
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1;
    letter-spacing: -.05em;
}
.stats-grid span {
    display: block;
    margin-top: 10px;
    color: var(--muted);
}
.testimonial p {
    margin-top: 0;
    font-size: 17px;
}
.testimonial strong, .testimonial span {
    display: block;
}
.faq-list {
    margin-top: 34px;
    display: grid;
    gap: 12px;
}
details {
    background: rgba(255,255,255,.72);
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 20px 24px;
}
summary {
    cursor: pointer;
    font-weight: 800;
}
details p {
    color: var(--muted);
    margin-bottom: 0;
}
.contact-section {
    align-items: start;
}
.contact-list {
    color: var(--muted);
    padding-left: 18px;
}
.contact-form {
    display: grid;
    gap: 16px;
    padding: 28px;
}
.contact-form label {
    display: grid;
    gap: 8px;
    font-weight: 700;
}
.contact-form input, .contact-form select, .contact-form textarea {
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 13px 14px;
    background: rgba(255,255,255,.82);
    outline: none;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
    border-color: rgba(36,35,33,.32);
    box-shadow: 0 0 0 4px rgba(47,44,40,.07);
}
.share-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}
.breadcrumb {
    width: min(1180px, calc(100% - 36px));
    margin: 34px auto 0;
    display: flex;
    gap: 10px;
    color: var(--muted);
    font-size: 14px;
}
.page-hero {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto;
    padding: 86px 0 46px;
}
.wide-figure {
    max-width: 920px;
}
.step-list {
    display: grid;
    gap: 16px;
}
.site-footer {
    padding: 72px 0 28px;
    background: #242321;
    color: rgba(255,255,255,.84);
}
.footer-grid {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr .8fr .8fr;
    gap: 46px;
}
.footer-brand img {
    box-shadow: none;
}
.site-footer p, .site-footer a, .site-footer li {
    color: rgba(255,255,255,.66);
}
.site-footer h2 {
    margin: 0 0 14px;
    color: #fff;
    font-size: 18px;
}
.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
}
.copyright {
    width: min(1180px, calc(100% - 36px));
    margin: 42px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,.12);
    color: rgba(255,255,255,.52);
    font-size: 13px;
}
@media (max-width: 980px) {
    .nav-shell {
        min-height: auto;
        padding: 16px 0 10px;
        flex-wrap: wrap;
    }
    .main-nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
        margin-left: 0;
        padding-bottom: 4px;
    }
    .nav-cta {
        margin-left: auto;
    }
    .search-shell {
        grid-template-columns: 1fr auto;
    }
    .domain-pill { grid-column: 1 / -1; }
    .hero, .section.split, .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero {
        min-height: auto;
        padding-top: 54px;
    }
    .card-grid, .video-grid, .case-grid, .testimonial-grid, .mini-grid, .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 640px) {
    .nav-shell, .search-shell, .hero, .section, .breadcrumb, .page-hero, .footer-grid, .copyright {
        width: min(100% - 28px, 1180px);
    }
    .nav-cta { display: none; }
    .search-shell {
        grid-template-columns: 1fr;
    }
    .search-shell button { width: 100%; }
    .hero h1, .page-hero h1 {
        letter-spacing: -.045em;
    }
    .hero-actions {
        flex-direction: column;
    }
    .button {
        text-align: center;
    }
    .card-grid, .video-grid, .case-grid, .testimonial-grid, .mini-grid, .stats-grid {
        grid-template-columns: 1fr;
    }
    .section, .section.muted {
        padding-top: 68px;
        padding-bottom: 68px;
    }
    .stats-grid div {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
    }
}