:root {
    --ink: #101827;
    --ink-soft: #4d5b6e;
    --muted: #708096;
    --line: #dfe6ef;
    --surface: #ffffff;
    --soft: #f3f6fa;
    --orange: #ff8a5b;
    --orange-deep: #e4663f;
    --blue: #2f75ff;
    --shadow: 0 24px 70px rgba(16, 24, 39, .11);
    --radius: 20px;
    --container: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--surface); font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
.container { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; }
.narrow { max-width: 820px; }
.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; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; background: var(--orange); padding: 8px 14px; border-radius: 8px; }
.skip-link:focus { top: 16px; }
.site-header { position: relative; z-index: 20; background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(223,230,239,.7); backdrop-filter: blur(14px); }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; line-height: 1.1; }
.brand-mark { display: grid; place-items: center; width: 58px; height: 38px; border-radius: 12px; color: #fff; font-size: 12px; font-weight: 800; letter-spacing: -.04em; background: #ff8a5b; box-shadow: 0 8px 18px rgba(16,24,39,.18); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 16px; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 10px; letter-spacing: .08em; }
.site-nav { display: flex; align-items: center; gap: 24px; color: #59687b; font-size: 13px; }
.site-nav a { transition: color .2s ease; }
.site-nav a:hover { color: var(--ink); }
.site-nav .nav-cta { padding: 9px 15px; border-radius: 999px; color: #fff; background: var(--ink); }
.nav-more { position: relative; }
.nav-more summary { display: inline-flex; align-items: center; gap: 3px; cursor: pointer; list-style: none; white-space: nowrap; }
.nav-more summary::-webkit-details-marker { display: none; }
.nav-more summary span { display: inline-flex; align-items: center; height: 1em; margin-left: 0; color: var(--orange-deep); font-size: 15px; line-height: 1; transform: translateY(-5px); }
.nav-more-menu { position: absolute; top: calc(100% + 16px); right: -12px; display: grid; min-width: 190px; padding: 8px; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: var(--shadow); }
.nav-more-menu a { display: flex; align-items: center; gap: 9px; padding: 9px 10px; border-radius: 9px; color: var(--ink-soft); }
.nav-more-menu a:hover { color: var(--ink); background: var(--soft); }
.nav-platform-logo { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 7px; color: #fff; background: var(--ink); font-size: 8px; font-weight: 800; }
.nav-toggle { display: none; border: 0; background: transparent; color: var(--ink); }
.breadcrumb { display: flex; gap: 9px; height: 30px; line-height: 30px; color: var(--muted); font-size: 12px; }
.breadcrumb a:hover { color: var(--ink); }
.hero, .sub-hero { color: #fff; background: #101827; overflow: hidden; }
.hero-home { min-height: 650px; display: flex; align-items: center; background: radial-gradient(circle at 70% 35%, rgba(67,118,255,.35), transparent 28%), radial-gradient(circle at 30% 15%, rgba(255,138,91,.14), transparent 25%), #101827; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 80px; padding: 90px 0 130px; }
.eyebrow { color: var(--orange-deep); font-size: 11px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow.light { color: #ffab88; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.16; letter-spacing: -.045em; }
h1 { font-size: clamp(42px, 5.6vw, 76px); margin: 20px 0 24px; }
h2 { font-size: clamp(30px, 4vw, 48px); margin: 14px 0 18px; }
h3 { font-size: 20px; }
em { color: var(--orange); font-style: normal; }
.hero-lead { max-width: 580px; color: #b8c4d5; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 22px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 0 20px; border: 0; border-radius: 999px; font-size: 13px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 25px rgba(16,24,39,.14); }
.button-primary { color: #24130f; background: var(--orange); }
.button-primary:hover { background: #ff9b73; }
.button-ghost { color: #fff; border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.05); }
.button-dark { color: #fff; background: var(--ink); }
.button-full { width: 100%; }
.button-arrow { font-size: 18px; line-height: 0; }
.hero-trust { display: flex; align-items: center; gap: 8px; color: #8f9caf; font-size: 12px; }
.trust-dot { width: 7px; height: 7px; border-radius: 50%; background: #69d19b; box-shadow: 0 0 0 5px rgba(105,209,155,.1); }
.hero-visual { position: relative; min-height: 400px; }
.orbit { position: absolute; border: 1px solid rgba(255,255,255,.12); border-radius: 50%; transform: rotate(-16deg); }
.orbit-one { width: 430px; height: 245px; left: 0; top: 80px; }
.orbit-two { width: 520px; height: 290px; left: -32px; top: 60px; transform: rotate(20deg); }
.file-card { position: absolute; display: flex; align-items: center; gap: 13px; padding: 17px; border: 1px solid rgba(255,255,255,.12); border-radius: 16px; color: #fff; background: rgba(255,255,255,.1); box-shadow: 0 20px 40px rgba(0,0,0,.2); backdrop-filter: blur(12px); }
.file-card strong, .file-card small { display: block; }
.file-card strong { font-size: 13px; }
.file-card small { margin-top: 3px; color: #aab8ca; font-size: 11px; }
.file-card-main { width: 310px; top: 125px; left: 70px; transform: rotate(-7deg); }
.file-card-small { width: 250px; right: -4px; top: 45px; transform: rotate(8deg); }
.file-icon, .mini-logo { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; color: #fff; background: linear-gradient(135deg, #ff9470, #e95d79); font-size: 11px; font-weight: 800; }
.mini-logo { width: 36px; height: 36px; border-radius: 10px; color: #ffe6dc; background: rgba(255,138,91,.22); }
.file-status { margin-left: auto; display: grid; place-items: center; width: 23px; height: 23px; border-radius: 50%; color: #101827; background: #9de9bd; font-size: 12px; font-weight: 800; }
.hero-sticker { position: absolute; right: 30px; bottom: 52px; display: grid; grid-template-columns: auto auto; align-items: end; column-gap: 6px; padding: 16px 19px; border-radius: 18px; color: var(--ink); background: #f6d66b; transform: rotate(-5deg); box-shadow: 0 18px 35px rgba(0,0,0,.18); }
.hero-sticker span { grid-row: span 2; font-size: 48px; font-weight: 800; line-height: .9; }
.hero-sticker small { font-size: 15px; font-weight: 800; }
.hero-sticker b { font-size: 11px; letter-spacing: .04em; }
.section { padding: 110px 0; }
.section-soft { background: var(--soft); }
.section-overlap { position: relative; margin-top: -76px; padding-top: 0; }
.helper-panel { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; align-items: center; padding: 36px 42px; border: 1px solid rgba(223,230,239,.9); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.helper-copy h2 { font-size: 27px; margin-bottom: 10px; }
.helper-copy p { color: var(--ink-soft); margin: 0; font-size: 14px; }
.input-row { display: flex; gap: 10px; }
.input-row input { width: 100%; min-width: 0; height: 52px; padding: 0 18px; border: 1px solid var(--line); border-radius: 12px; outline: none; color: var(--ink); background: #fbfcfe; }
.input-row input:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(47,117,255,.1); }
.input-row .button { flex: 0 0 auto; height: 52px; border-radius: 12px; }
.form-hint { margin: 10px 0 0; color: var(--muted); font-size: 11px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section-heading h2 { margin-bottom: 0; }
.inline-link, .card-link { color: var(--orange-deep); font-size: 13px; font-weight: 800; }
.inline-link span, .card-link span { margin-left: 5px; font-size: 17px; }
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.platform-card { display: flex; align-items: center; gap: 14px; min-height: 126px; padding: 17px; border: 1px solid var(--line); border-radius: 16px; background: #fff; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.platform-card:hover { border-color: #ffb39a; transform: translateY(-3px); box-shadow: 0 14px 25px rgba(16,24,39,.07); }
.platform-logo { display: grid; place-items: center; flex: 0 0 auto; width: 44px; height: 44px; border-radius: 13px; color: #fff; background: var(--ink); font-size: 10px; font-weight: 800; }
.platform-card:nth-child(2n) .platform-logo { background: #3969d4; }
.platform-card:nth-child(3n) .platform-logo { background: #e66d4f; }
.platform-card-body { min-width: 0; }
.platform-card-body strong, .platform-card-body span { display: block; }
.platform-card-body strong { margin-bottom: 4px; font-size: 15px; }
.platform-card-body span { color: var(--muted); font-size: 11px; line-height: 1.55; }
.card-arrow { margin-left: auto; align-self: flex-start; color: var(--orange-deep); font-size: 20px; }
.problem-section { padding-top: 25px; }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.problem-grid-secondary { margin-top: 13px; }
.problem-card { display: grid; grid-template-columns: auto 1fr; gap: 13px; min-height: 126px; padding: 21px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.problem-grid-primary .problem-card { border-top: 3px solid var(--orange); }
.problem-number { color: var(--orange-deep); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.problem-card strong, .problem-card p { display: block; }
.problem-card strong { font-size: 16px; }
.problem-card p { margin: 5px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.process-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: start; }
.strength-section { padding-top: 0; }
.strength-panel { display: grid; grid-template-columns: .95fr 1.05fr; gap: 35px; align-items: center; padding: 34px 38px; border-radius: var(--radius); color: #fff; background: linear-gradient(120deg, #14233c, #1e3150); box-shadow: 0 20px 55px rgba(16,24,39,.15); }
.strength-intro h2 { margin: 12px 0 11px; font-size: clamp(27px, 3vw, 39px); }
.strength-intro p { max-width: 480px; margin: 0; color: #b8c4d5; font-size: 13px; }
.strength-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.strength-stat { min-height: 116px; padding: 20px 15px; border: 1px solid rgba(255,255,255,.12); border-radius: 15px; background: rgba(255,255,255,.07); }
.strength-stat strong, .strength-stat span { display: block; }
.strength-stat strong { color: var(--orange); font-size: 29px; line-height: 1.1; }
.strength-stat span { margin-top: 9px; color: #d1dbea; font-size: 11px; }
.strength-note { margin: 12px 4px 0; color: var(--muted); font-size: 11px; }
.section-lead { max-width: 370px; color: var(--ink-soft); }
.steps { border-top: 1px solid var(--line); }
.step { display: grid; grid-template-columns: 60px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.step > span { color: var(--orange-deep); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.step strong { display: block; font-size: 16px; }
.step p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.article-grid-large { grid-template-columns: repeat(3, 1fr); }
.article-card { display: flex; flex-direction: column; min-height: 268px; padding: 24px; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.article-card h3 { margin: 16px 0 10px; font-size: 20px; }
.article-card h3 a:hover { color: var(--orange-deep); }
.article-card p { color: var(--ink-soft); font-size: 13px; }
.article-card .card-link { margin-top: auto; }
.article-meta { display: flex; align-items: center; gap: 13px; color: var(--muted); font-size: 11px; }
.article-meta span { padding: 4px 8px; border-radius: 999px; color: var(--orange-deep); background: #fff0ea; }
.faq-section { border-top: 1px solid var(--line); }
.faq-list { margin-top: 30px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 19px 0; cursor: pointer; list-style: none; font-size: 15px; font-weight: 700; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary span { color: var(--orange-deep); font-size: 24px; font-weight: 400; transition: transform .2s; }
.faq-item[open] summary span { transform: rotate(45deg); }
.faq-answer { padding: 0 35px 21px 0; color: var(--ink-soft); font-size: 13px; }
.sub-hero { padding: 92px 0 140px; background: radial-gradient(circle at 80% 20%, rgba(47,117,255,.32), transparent 31%), #101827; }
.sub-hero-grid { display: grid; grid-template-columns: 1fr 280px; align-items: center; gap: 70px; }
.sub-hero h1 { max-width: 700px; margin-bottom: 20px; font-size: clamp(38px, 5vw, 66px); }
.sub-hero p { max-width: 650px; color: #b8c4d5; font-size: 16px; }
.sub-hero-logo { display: grid; place-items: center; min-height: 230px; border: 1px solid rgba(255,255,255,.14); border-radius: 40px; background: rgba(255,255,255,.07); transform: rotate(5deg); }
.sub-hero-logo span { color: var(--orange); font-size: 76px; font-weight: 800; line-height: 1; }
.sub-hero-logo small { color: #b8c4d5; font-size: 13px; }
.platform-helper { margin-top: -76px; }
.content-grid { display: grid; grid-template-columns: 1fr 310px; gap: 80px; }
.main-column h2 { margin-top: 12px; }
.issue-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 32px 0 54px; }
.issue-grid > div { padding: 17px; border-left: 3px solid var(--orange); border-radius: 0 12px 12px 0; background: var(--soft); }
.issue-grid-priority { grid-template-columns: repeat(3, 1fr); }
.issue-grid .issue-main { border-left-color: var(--blue); background: #eef4ff; }
.issue-grid strong, .issue-grid span { display: block; }
.issue-grid strong { margin-bottom: 5px; }
.issue-grid span { color: var(--muted); font-size: 12px; }
.side-card { padding: 26px; border-radius: 18px; background: var(--soft); }
.side-card h3 { margin: 10px 0; }
.side-card p { color: var(--ink-soft); font-size: 13px; }
.sticky { position: sticky; top: 110px; }
.rich-content { color: var(--ink-soft); font-size: 15px; }
.rich-content h2, .rich-content h3 { color: var(--ink); margin-top: 34px; }
.rich-content li { margin: 8px 0; }
.page-hero { padding: 84px 0 92px; color: #fff; background: #101827; }
.page-hero h1 { max-width: 760px; margin-bottom: 0; font-size: clamp(38px, 5vw, 64px); }
.page-hero p { max-width: 650px; margin: 18px 0 0; color: #b8c4d5; font-size: 17px; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; }
.filter-chip { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; }
.filter-chip:hover, .filter-chip.active { border-color: var(--ink); color: #fff; background: var(--ink); }
.empty-state { padding: 70px 20px; text-align: center; color: var(--muted); background: var(--soft); border-radius: var(--radius); }
.article-page { padding: 75px 0 110px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 250px; gap: 90px; }
.article-main > h1 { margin: 22px 0 16px; font-size: clamp(38px, 5vw, 62px); }
.article-excerpt { color: var(--muted); font-size: 18px; }
.article-content { margin-top: 52px; }
.article-cta { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 64px; padding: 30px; border-radius: 20px; color: #fff; background: var(--ink); }
.article-cta h2 { margin: 11px 0; font-size: 26px; }
.article-cta p { margin: 0; color: #b8c4d5; font-size: 13px; }
.article-cta .button { flex: 0 0 auto; }
.static-content > section { padding: 28px 0; border-bottom: 1px solid var(--line); }
.static-content h2 { font-size: 27px; }
.site-footer { padding: 65px 0 20px; color: #bbc5d3; background: var(--ink); }
.brand-footer strong { color: #fff; }
.brand-footer small { color: #7f8da3; }
.footer-note { max-width: 280px; margin-top: 20px; color: #7f8da3; font-size: 12px; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 50px; padding-bottom: 50px; }
.footer-grid h3 { color: #fff; font-size: 13px; letter-spacing: .02em; }
.footer-grid > div:not(:first-child) a { display: block; margin: 10px 0; color: #93a1b4; font-size: 12px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.1); color: #68768a; font-size: 11px; }
.modal { display: none; position: fixed; inset: 0; z-index: 50; align-items: center; justify-content: center; padding: 20px; }
.modal.is-open { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(10,16,28,.7); backdrop-filter: blur(5px); }
.modal-card { position: relative; width: min(100%, 420px); padding: 35px; border-radius: 22px; background: #fff; box-shadow: 0 25px 80px rgba(0,0,0,.3); }
.modal-card h2 { margin: 13px 0 9px; font-size: 27px; }
.modal-card > p { color: var(--ink-soft); font-size: 13px; }
.modal-close { position: absolute; top: 14px; right: 16px; width: 32px; height: 32px; border: 0; border-radius: 50%; color: var(--muted); background: transparent; font-size: 25px; }
.qr-box { display: grid; place-items: center; width: 198px; height: 198px; margin: 21px auto; border: 1px solid var(--line); border-radius: 16px; background: #fff; overflow: hidden; }
.qr-box img { width: 180px; height: 180px; object-fit: contain; }
.wechat-line { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; padding: 11px 13px; border-radius: 10px; background: var(--soft); font-size: 12px; }
.wechat-line span { color: var(--muted); }
.wechat-line strong { flex: 1; font-size: 14px; }
.text-button { padding: 0; border: 0; color: var(--orange-deep); background: transparent; font-size: 12px; font-weight: 700; }
.modal-hint { margin: 15px 0 0 !important; color: var(--muted) !important; text-align: center; font-size: 11px !important; }
@media (max-width: 900px) {
    .site-nav { display: none; position: absolute; top: 70px; left: 24px; right: 24px; flex-direction: column; align-items: stretch; gap: 0; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: var(--shadow); }
    .site-nav.is-open { display: flex; }
    .site-nav a { padding: 11px 12px; }
    .nav-toggle { display: block; }
    .hero-grid, .process-grid, .helper-panel, .sub-hero-grid, .content-grid, .article-layout, .strength-panel { grid-template-columns: 1fr; gap: 38px; }
    .hero-grid { padding-top: 70px; }
    .hero-visual { min-height: 320px; }
    .sub-hero-logo { width: 210px; min-height: 170px; margin: 0 auto; }
    .article-side { display: none; }
    .platform-grid, .article-grid, .article-grid-large, .problem-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; gap: 25px; }
    .nav-more-menu { position: static; margin: 0 0 6px; box-shadow: none; }
    .nav-more summary { padding: 11px 12px; }
}
@media (max-width: 580px) {
    .container { width: min(calc(100% - 32px), var(--container)); }
    .site-header .container { width: calc(100% - 32px); }
    .hero-home { min-height: auto; }
    .hero-grid { padding: 62px 0 120px; }
    h1 { font-size: 42px; }
    .hero-lead { font-size: 15px; }
    .hero-actions .button { width: 100%; }
    .hero-visual { min-height: 280px; transform: scale(.84); transform-origin: left top; margin-bottom: -40px; }
    .section { padding: 75px 0; }
    .section-overlap { margin-top: -55px; }
    .helper-panel { padding: 24px 20px; }
    .strength-panel { padding: 26px 21px; gap: 25px; }
    .strength-stats { grid-template-columns: 1fr; }
    .input-row { flex-direction: column; }
    .input-row .button { width: 100%; }
    .section-heading { align-items: flex-start; flex-direction: column; }
    .platform-grid, .article-grid, .article-grid-large, .issue-grid, .issue-grid-priority, .problem-grid { grid-template-columns: 1fr; }
    .problem-section { padding-top: 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid > div:first-child { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; gap: 6px; }
    .article-cta { align-items: flex-start; flex-direction: column; }
    .article-cta .button { width: 100%; }
    .modal-card { padding: 28px 22px; }
}