:root {
    --orange: #f59a00;
    --orange-bright: #ffad0a;
    --ink: #1f1d1b;
    --ink-soft: #45413e;
    --paper: #f7f4ee;
    --white: #fffdf8;
    --line: rgba(31, 29, 27, 0.16);
    --shell: min(1180px, calc(100vw - 48px));
    --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 999; background: var(--ink); color: white; padding: 12px 18px; border-radius: 10px; }
.skip-link:focus { top: 16px; }

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    transition: background .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled { background: rgba(247, 244, 238, .9); backdrop-filter: blur(18px); box-shadow: 0 1px 0 rgba(31,29,27,.08); }
.nav-wrap { height: 82px; display: flex; align-items: center; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 800; letter-spacing: .06em; white-space: nowrap; }
.brand img { border-radius: 50%; object-fit: cover; }
.main-nav { display: flex; gap: 28px; margin-left: auto; }
.main-nav a { font-size: 14px; font-weight: 600; color: var(--ink-soft); position: relative; }
.main-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px; background: var(--orange); transition: right .25s; }
.main-nav a:hover::after { right: 0; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; border: 1px solid transparent; font-weight: 750; transition: transform .25s ease, box-shadow .25s ease, background .25s ease; }
.button:hover { transform: translateY(-3px); }
.button-small { background: var(--ink); color: white; padding: 12px 20px; border-radius: 999px; font-size: 14px; }
.menu-button { display: none; }

.hero { min-height: 100vh; padding: 154px 0 0; background: var(--paper); position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 60px; align-items: center; min-height: 670px; position: relative; z-index: 2; }
.eyebrow, .section-kicker { margin: 0 0 28px; color: var(--orange); font-size: 13px; font-weight: 800; letter-spacing: .17em; text-transform: uppercase; }
.eyebrow span { display: inline-block; border: 1px solid var(--orange); border-radius: 999px; padding: 8px 13px; }
.hero h1 { font-size: clamp(58px, 6.2vw, 92px); line-height: .98; letter-spacing: -.075em; margin: 0; font-weight: 900; }
.hero h1 em { font-style: normal; color: var(--orange); position: relative; }
.hero h1 em::after { content: ""; position: absolute; height: 10px; left: 4px; right: -5px; bottom: 3px; background: var(--orange); opacity: .22; transform: rotate(-1deg); }
.hero-lead { max-width: 570px; margin: 30px 0 0; font-size: 18px; line-height: 1.85; color: var(--ink-soft); }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 38px; }
.button-primary { padding: 17px 24px; border-radius: 14px; background: var(--orange); box-shadow: 0 12px 35px rgba(245,154,0,.23); }
.button-primary:hover { box-shadow: 0 15px 40px rgba(245,154,0,.35); }
.text-link { font-size: 14px; font-weight: 700; border-bottom: 1px solid var(--ink); padding: 8px 0; }
.trust-row { margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.trust-row div { display: grid; gap: 5px; }
.trust-row strong { font-size: 25px; letter-spacing: -.03em; }
.trust-row span { font-size: 12px; line-height: 1.55; color: #706b65; }

.hero-visual { min-height: 610px; position: relative; }
.poster-frame { overflow: hidden; box-shadow: 0 30px 75px rgba(31,29,27,.2); }
.poster-frame-main { width: 78%; height: 560px; margin-left: auto; border-radius: 220px 220px 32px 32px; transform: rotate(2deg); background: var(--ink); }
.poster-frame-main img { width: 100%; height: 100%; object-fit: cover; }
.image-note { position: absolute; right: 20px; bottom: 18px; background: rgba(31,29,27,.72); color: rgba(255,255,255,.78); padding: 7px 10px; border-radius: 8px; font-size: 11px; backdrop-filter: blur(8px); }
.logo-sticker { position: absolute; width: 104px; height: 104px; top: -24px; right: -22px; background: white; border: 5px solid var(--paper); border-radius: 50%; box-shadow: 0 15px 35px rgba(31,29,27,.16); transform: rotate(8deg); }
.logo-sticker img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.floating-note { position: absolute; z-index: 4; box-shadow: 0 20px 50px rgba(31,29,27,.18); }
.note-topic { left: -24px; top: 70px; width: 215px; padding: 22px; background: var(--orange); border-radius: 6px 24px 24px 24px; transform: rotate(-4deg); }
.note-topic span { display: block; font-size: 11px; font-weight: 800; letter-spacing: .16em; margin-bottom: 12px; }
.note-topic strong { font-size: 18px; line-height: 1.45; }
.note-people { left: 15px; bottom: 23px; display: flex; align-items: center; gap: 13px; padding: 15px 18px; background: var(--white); border-radius: 18px; transform: rotate(2deg); }
.note-people p { margin: 0; font-size: 12px; line-height: 1.5; color: #68625d; }
.note-people b { color: var(--ink); }
.avatar-stack { display: flex; }
.avatar-stack i { width: 29px; height: 29px; margin-left: -8px; border-radius: 50%; border: 2px solid white; background: var(--orange); }
.avatar-stack i:first-child { margin-left: 0; background: #37322f; }
.avatar-stack i:last-child { background: #f3c16a; }
.hero-orbit { position: absolute; border: 1px solid rgba(245,154,0,.3); border-radius: 50%; pointer-events: none; }
.hero-orbit-one { width: 560px; height: 560px; right: -250px; top: -250px; }
.hero-orbit-two { width: 760px; height: 760px; left: -540px; bottom: -460px; }
.marquee { margin-top: 64px; overflow: hidden; background: var(--orange); border-block: 1px solid var(--ink); transform: rotate(-1deg) scale(1.02); }
.marquee-track { width: max-content; display: flex; align-items: center; gap: 42px; padding: 17px 0; animation: marquee 23s linear infinite; }
.marquee span { font-size: 17px; font-weight: 900; letter-spacing: .1em; }
.marquee i { font-style: normal; font-size: 20px; }
@keyframes marquee { to { transform: translateX(-50%); } }

.section { padding: 130px 0; }
.section h2 { font-size: clamp(42px, 5vw, 70px); letter-spacing: -.06em; line-height: 1.08; margin: 0; }
.section-intro { background: var(--white); }
.intro-grid { display: grid; grid-template-columns: .65fr 1.5fr; gap: 70px 55px; }
.intro-copy p { margin: 32px 0 0; max-width: 700px; font-size: 19px; line-height: 1.9; color: var(--ink-soft); }
.intro-principles { grid-column: 2; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.intro-principles article { padding: 32px 24px 0 0; }
.intro-principles article + article { padding-left: 24px; border-left: 1px solid var(--line); }
.intro-principles article > span { color: var(--orange); font-size: 12px; font-weight: 800; }
.intro-principles h3 { margin: 42px 0 14px; font-size: 21px; }
.intro-principles p { margin: 0; font-size: 15px; line-height: 1.75; color: #6d6761; }

.activities { background: var(--paper); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 60px; margin-bottom: 58px; }
.section-heading > p { max-width: 460px; margin: 0 0 8px; font-size: 17px; line-height: 1.8; color: var(--ink-soft); }
.activity-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; }
.activity-card { min-height: 380px; border-radius: var(--radius); overflow: hidden; position: relative; }
.activity-featured { background: white; display: grid; grid-template-columns: 1.18fr .82fr; grid-column: 1 / -1; min-height: 460px; }
.activity-image img { width: 100%; height: 100%; object-fit: cover; }
.activity-content { padding: 50px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.pill { display: inline-flex; width: fit-content; padding: 7px 11px; border: 1px solid currentColor; border-radius: 999px; font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.activity-card h3 { font-size: clamp(30px, 3vw, 46px); letter-spacing: -.05em; line-height: 1.15; margin: 28px 0 18px; }
.activity-card p { font-size: 16px; line-height: 1.8; margin: 0; }
.activity-content p { color: #69635d; }
.activity-content a { margin-top: 42px; font-size: 14px; font-weight: 800; border-bottom: 1px solid; padding-bottom: 6px; }
.activity-orange { background: var(--orange); padding: 42px; }
.activity-dark { background: var(--ink); color: white; padding: 42px; }
.activity-orange p, .activity-dark p { max-width: 420px; }
.card-number { position: absolute; top: 24px; right: 30px; font-size: 100px; font-weight: 900; line-height: 1; opacity: .1; }
.topic-cloud { position: absolute; bottom: 32px; left: 42px; right: 42px; display: flex; gap: 9px; flex-wrap: wrap; }
.topic-cloud span { background: rgba(255,255,255,.45); padding: 8px 13px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.eye-mark { position: absolute; width: 130px; height: 88px; right: 40px; bottom: 35px; border-radius: 70% 25% 70% 25%; background: var(--orange); transform: rotate(-8deg); }
.eye-mark i { position: absolute; width: 50px; height: 50px; background: var(--ink); border-radius: 50%; left: 38px; top: 20px; border: 10px solid white; }
.activity-photo { min-height: 540px; }
.activity-photo > img { width: 100%; height: 100%; object-fit: cover; }
.activity-photo::after { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent 35%, rgba(14,18,24,.82)); }
.photo-overlay { position: absolute; z-index: 2; left: 35px; right: 35px; bottom: 32px; color: white; }
.photo-overlay h3 { margin-bottom: 0; }
.activity-list { background: white; padding: 42px; }
.list-lead { font-size: 27px !important; font-weight: 800; letter-spacing: -.04em; }
.activity-list ul { list-style: none; padding: 0; margin: 48px 0 0; }
.activity-list li { display: flex; gap: 18px; align-items: center; padding: 18px 0; border-top: 1px solid var(--line); font-size: 16px; font-weight: 650; }
.activity-list li span { font-size: 11px; color: var(--orange); }
.sample-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.sample-card { display: block; min-height: 0; border-radius: 22px; overflow: hidden; background: var(--ink); box-shadow: 0 16px 34px rgba(31,29,27,.09); transition: transform .3s ease, box-shadow .3s ease; }
.sample-card:hover { transform: translateY(-5px); box-shadow: 0 23px 42px rgba(31,29,27,.17); }
.sample-card img { width: 100%; height: auto; display: block; }
.sample-card-wide { grid-column: span 2; }
.activity-list-after { margin-top: 18px; min-height: 0; display: grid; grid-template-columns: .75fr 1.25fr; align-items: center; }
.activity-list-after ul { margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 28px; }

.first-time { background: var(--orange); }
.first-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 100px; align-items: start; }
.first-time .section-kicker { color: var(--ink); }
.first-copy > p:not(.section-kicker) { font-size: 18px; line-height: 1.85; margin: 30px 0 38px; max-width: 480px; }
.button-ink { background: var(--ink); color: white; padding: 17px 24px; border-radius: 14px; }
.steps { border-top: 1px solid rgba(31,29,27,.5); }
.step { display: grid; grid-template-columns: 70px 1fr; gap: 24px; padding: 31px 0; border-bottom: 1px solid rgba(31,29,27,.5); }
.step-index { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font-size: 11px; font-weight: 800; }
.step h3 { margin: 2px 0 10px; font-size: 23px; }
.step p { margin: 0; line-height: 1.75; font-size: 15px; max-width: 560px; }
.step.is-active .step-index { background: var(--ink); color: white; }

.boundaries { background: var(--ink); color: white; }
.boundary-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; }
.boundary-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.boundary-cards article { border: 1px solid rgba(255,255,255,.17); border-radius: 22px; min-height: 335px; padding: 27px; display: flex; flex-direction: column; }
.boundary-cards article:nth-child(2) { background: var(--orange); color: var(--ink); border-color: var(--orange); transform: translateY(28px); }
.boundary-icon { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; font-size: 24px; }
.boundary-cards h3 { margin: auto 0 15px; font-size: 22px; }
.boundary-cards p { color: rgba(255,255,255,.65); margin: 0; line-height: 1.75; font-size: 14px; }
.boundary-cards article:nth-child(2) p { color: rgba(31,29,27,.72); }

.story { background: var(--white); }
.story-grid { display: grid; grid-template-columns: .55fr 1.35fr; gap: 80px; }
.story-mark { align-self: start; background: var(--paper); padding: 35px; border-radius: var(--radius); position: sticky; top: 120px; }
.story-mark img { width: 100%; border-radius: 22px; mix-blend-mode: multiply; }
.story-mark span { display: block; font-size: 12px; font-weight: 800; line-height: 1.6; letter-spacing: .12em; margin-top: 25px; }
.story-copy > p:not(.section-kicker) { font-size: 18px; line-height: 1.9; color: var(--ink-soft); margin: 30px 0; max-width: 690px; }
.story-copy blockquote { margin: 45px 0 0; padding: 30px 0 0; border-top: 1px solid var(--line); font-size: 27px; font-weight: 800; letter-spacing: -.03em; }
.story-timeline { grid-column: 2; margin-top: 20px; border-top: 1px solid var(--line); }
.story-timeline div { display: grid; grid-template-columns: 115px 1fr; align-items: baseline; padding: 22px 0; border-bottom: 1px solid var(--line); }
.story-timeline strong { color: var(--orange); font-size: 17px; }
.story-timeline span { font-size: 15px; color: var(--ink-soft); }

.faq { background: var(--paper); }
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.faq h2 { font-size: 48px; }
.faq-list { border-top: 1px solid var(--ink); }
details { border-bottom: 1px solid var(--line); }
summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 25px 0; font-size: 18px; font-weight: 700; }
summary::-webkit-details-marker { display: none; }
summary span { font-size: 24px; font-weight: 400; transition: transform .2s; }
details[open] summary span { transform: rotate(45deg); }
details p { max-width: 700px; margin: -4px 0 25px; font-size: 15px; line-height: 1.8; color: var(--ink-soft); }

.final-cta { background: var(--orange); padding: 120px 0; text-align: center; }
.final-cta .section-kicker { color: var(--ink); }
.final-cta h2 { font-size: clamp(48px, 7vw, 92px); line-height: 1.05; letter-spacing: -.065em; margin: 0 auto 40px; }
.button-light { background: var(--white); color: var(--ink); border-radius: 16px; padding: 18px 28px; }
.cta-actions { display: flex; align-items: center; justify-content: center; gap: 16px; }
.scan-card { display: flex; align-items: center; gap: 12px; padding: 8px 17px 8px 8px; background: rgba(255,253,248,.88); border: 1px solid rgba(31,29,27,.16); border-radius: 16px; text-align: left; }
.scan-card img { width: 66px; height: 66px; object-fit: cover; border-radius: 9px; background: white; }
.scan-card div { display: grid; gap: 5px; }
.scan-card strong { font-size: 14px; }
.scan-card span { font-size: 11px; color: #6b655f; }
.cta-note { margin: 20px 0 0; font-size: 12px; opacity: .68; }

.site-footer { background: var(--ink); color: white; padding: 70px 0 28px; }
.footer-top { display: grid; grid-template-columns: 1fr 1.1fr .8fr; gap: 60px; align-items: start; }
.footer-brand { align-items: center; }
.footer-brand span { display: grid; }
.footer-brand small { font-size: 11px; font-weight: 500; color: rgba(255,255,255,.5); letter-spacing: .05em; margin-top: 4px; }
.footer-top > p { margin: 0; line-height: 1.9; color: rgba(255,255,255,.66); font-size: 15px; }
.footer-top nav { display: grid; gap: 13px; font-size: 14px; }
.footer-top nav a:hover { color: var(--orange); }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 65px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.42); font-size: 11px; }
.beian-link { color: rgba(255,255,255,.58); }
.beian-link:hover { color: var(--orange); }
.mobile-cta { display: none; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal-delay { transition-delay: .12s; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1020px) {
    .main-nav { display: none; }
    .nav-cta { margin-left: auto; }
    .hero-grid { grid-template-columns: 1fr; padding-bottom: 30px; }
    .hero-copy { max-width: 760px; }
    .hero-visual { min-height: 630px; max-width: 650px; width: 100%; margin: 0 auto; }
    .poster-frame-main { width: 76%; }
    .intro-grid, .story-grid { grid-template-columns: .42fr 1.58fr; }
    .boundary-grid { grid-template-columns: 1fr; }
    .boundary-title { max-width: 650px; }
    .first-grid { gap: 55px; }
}

@media (max-width: 760px) {
    :root { --shell: min(100% - 32px, 1180px); --radius: 22px; }
    .site-header { background: rgba(247,244,238,.92); backdrop-filter: blur(14px); }
    .nav-wrap { height: 68px; }
    .brand { font-size: 18px; }
    .brand img { width: 39px; height: 39px; }
    .nav-cta { display: none; }
    .menu-button { display: grid; margin-left: auto; width: 43px; height: 43px; place-content: center; gap: 7px; background: var(--ink); border: 0; border-radius: 50%; }
    .menu-button span { display: block; width: 18px; height: 2px; background: white; transition: transform .25s; }
    .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
    .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4.5px) rotate(-45deg); }
    .main-nav { position: fixed; inset: 68px 0 auto; background: var(--paper); padding: 32px 20px 40px; border-top: 1px solid var(--line); display: none; gap: 0; flex-direction: column; }
    .main-nav.is-open { display: flex; }
    .main-nav a { font-size: 24px; padding: 15px 0; border-bottom: 1px solid var(--line); }
    .main-nav a::after { display: none; }
    .hero { padding-top: 118px; }
    .hero-grid { gap: 55px; min-height: 0; }
    .eyebrow { margin-bottom: 20px; }
    .hero h1 { font-size: clamp(50px, 15.8vw, 70px); }
    .hero-lead { font-size: 16px; line-height: 1.75; margin-top: 24px; }
    .hero-actions { align-items: stretch; flex-direction: column; gap: 12px; margin-top: 28px; }
    .button-primary { width: 100%; }
    .text-link { text-align: center; border: 0; }
    .trust-row { gap: 12px; margin-top: 30px; }
    .trust-row strong { font-size: 20px; }
    .trust-row span { font-size: 10px; }
    .hero-visual { min-height: 520px; }
    .poster-frame-main { width: 86%; height: 475px; border-radius: 150px 150px 25px 25px; }
    .note-topic { left: -3px; top: 55px; width: 180px; padding: 17px; }
    .note-topic strong { font-size: 15px; }
    .note-people { left: 0; bottom: 10px; }
    .logo-sticker { width: 78px; height: 78px; right: -4px; }
    .marquee { margin-top: 35px; }
    .section { padding: 88px 0; }
    .section h2 { font-size: 43px; }
    .intro-grid, .first-grid, .story-grid, .faq-grid { display: block; }
    .section-kicker { margin-bottom: 20px; }
    .intro-copy p, .story-copy > p:not(.section-kicker) { font-size: 16px; line-height: 1.8; }
    .intro-principles { display: block; margin-top: 48px; }
    .intro-principles article { padding: 27px 0 !important; border-left: 0 !important; border-bottom: 1px solid var(--line); }
    .intro-principles h3 { margin: 22px 0 10px; }
    .section-heading { display: block; margin-bottom: 40px; }
    .section-heading > p { margin-top: 22px; font-size: 15px; }
    .activity-grid { display: block; }
    .activity-card { margin-top: 16px; min-height: 355px; }
    .activity-featured { display: block; }
    .activity-image { height: 250px; }
    .activity-content { padding: 30px; }
    .activity-content a { margin-top: 25px; }
    .activity-orange, .activity-dark, .activity-list { padding: 30px; }
    .activity-photo { height: 500px; }
    .sample-gallery { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .sample-card-wide { grid-column: span 2; }
    .activity-list-after { display: block; padding: 26px 24px; }
    .activity-list-after ul { margin-top: 26px; }
    .first-copy { margin-bottom: 60px; }
    .step { grid-template-columns: 50px 1fr; gap: 16px; }
    .boundary-cards { display: block; }
    .boundary-cards article { min-height: 265px; margin-top: 14px; }
    .boundary-cards article:nth-child(2) { transform: none; }
    .story-mark { position: static; width: 180px; margin-bottom: 55px; padding: 20px; }
    .story-copy blockquote { font-size: 22px; }
    .story-timeline { margin-top: 55px; }
    .story-timeline div { grid-template-columns: 86px 1fr; }
    .faq-list { margin-top: 45px; }
    summary { font-size: 16px; }
    .final-cta { padding: 90px 0 110px; }
    .cta-actions { align-items: stretch; flex-direction: column; }
    .cta-actions .button-light { width: 100%; }
    .scan-card { justify-content: center; padding: 8px 18px 8px 8px; }
    .footer-top { display: block; }
    .footer-top > p { margin: 35px 0; }
    .footer-bottom { display: grid; gap: 10px; margin-bottom: 65px; }
    .mobile-cta { position: fixed; z-index: 80; display: flex; align-items: center; justify-content: space-between; left: 12px; right: 12px; bottom: 12px; padding: 16px 20px; color: var(--ink); background: var(--orange); border: 1px solid var(--ink); border-radius: 14px; box-shadow: 0 14px 36px rgba(31,29,27,.28); font-size: 15px; font-weight: 850; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; transform: none; }
}