:root {
  --ink: #17151d;
  --paper: #f7f4ee;
  --white: #ffffff;
  --coral: #ff5c5c;
  --coral-dark: #da353f;
  --aqua: #44c7c0;
  --yellow: #ffd166;
  --blue: #275dad;
  --muted: #68636e;
  --line: #d9d2c7;
  --shadow: 6px 6px 0 var(--ink);
  --radius: 6px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: radial-gradient(#d9d2c7 0.8px, transparent 0.8px);
  background-size: 18px 18px;
  opacity: .42;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(calc(100% - 36px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; top: 10px; left: -999px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 12px; }
.skip-link:focus { left: 10px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 238, .96);
  border-bottom: 2px solid var(--ink);
  backdrop-filter: blur(12px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 900; white-space: nowrap; }
.brand img { width: 44px; height: 44px; border: 2px solid var(--ink); border-radius: var(--radius); }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 15px; font-weight: 700; }
.nav-links a { position: relative; padding: 4px 0; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 3px; background: var(--coral); transition: .2s ease; }
.nav-links a:hover::after, .nav-links a.active::after { right: 0; }
.nav-download { background: var(--coral); color: #fff; border: 2px solid var(--ink); padding: 10px 18px !important; box-shadow: 3px 3px 0 var(--ink); }
.nav-download::after { display: none; }
.nav-download:hover { transform: translate(2px,2px); box-shadow: 1px 1px 0 var(--ink); }
.menu-toggle { display: none; width: 44px; height: 44px; border: 2px solid var(--ink); background: var(--yellow); border-radius: var(--radius); font-size: 24px; font-weight: 900; }

.hero { position: relative; overflow: hidden; border-bottom: 2px solid var(--ink); }
.hero::after { content: "WIND / ANIME / NOW"; position: absolute; right: -50px; top: 80px; color: rgba(23,21,29,.06); font-size: 76px; font-weight: 1000; transform: rotate(90deg); letter-spacing: 0; pointer-events: none; }
.hero-grid { min-height: 650px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 70px; padding: 72px 0 60px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px; font-size: 14px; font-weight: 900; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 36px; height: 5px; background: var(--aqua); border: 1px solid var(--ink); }
h1,h2,h3 { margin: 0; line-height: 1.25; font-weight: 1000; }
h1 { max-width: 620px; font-size: clamp(44px, 7vw, 82px); }
.hero h1 span { display: block; color: var(--coral); }
.lead { max-width: 610px; margin: 24px 0 28px; color: #4f4a54; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 11px 24px; border: 2px solid var(--ink); border-radius: var(--radius); font-weight: 900; transition: .18s ease; cursor: pointer; }
.btn-primary { color: #fff; background: var(--coral); box-shadow: 5px 5px 0 var(--ink); }
.btn-secondary { background: var(--white); }
.btn:hover { transform: translate(3px,3px); box-shadow: 1px 1px 0 var(--ink); }
.download-note { margin: 16px 0 0; color: var(--muted); font-size: 13px; }
.download-note strong { color: var(--ink); }

.hero-visual { position: relative; min-height: 510px; display: grid; place-items: center; }
.phone-shell { position: relative; z-index: 2; width: min(330px, 82vw); padding: 12px; background: var(--ink); border: 3px solid var(--ink); border-radius: 28px; transform: rotate(2deg); box-shadow: 14px 14px 0 var(--aqua); }
.phone-shell::before { content: ""; position: absolute; top: 8px; left: 50%; width: 70px; height: 5px; transform: translateX(-50%); border-radius: 10px; background: #4a4650; }
.phone-shell img { width: 100%; max-width: 400px; border-radius: 18px; background: #ece8e0; }
.burst { position: absolute; z-index: 3; top: 34px; right: 2px; width: 112px; aspect-ratio: 1; display: grid; place-items: center; padding: 14px; text-align: center; background: var(--yellow); border: 3px solid var(--ink); clip-path: polygon(50% 0%,62% 17%,81% 8%,84% 29%,100% 34%,87% 50%,100% 66%,81% 72%,78% 94%,60% 83%,47% 100%,37% 81%,17% 90%,16% 69%,0 62%,14% 47%,2% 29%,24% 28%,29% 7%); font-size: 15px; line-height: 1.3; font-weight: 1000; transform: rotate(8deg); }
.visual-ticket { position: absolute; bottom: 18px; left: 0; z-index: 3; padding: 14px 18px; background: #fff; border: 2px solid var(--ink); box-shadow: 5px 5px 0 var(--ink); font-weight: 900; transform: rotate(-3deg); }

.signal-strip { border-bottom: 2px solid var(--ink); background: var(--ink); color: #fff; }
.signal-grid { display: grid; grid-template-columns: repeat(4,1fr); }
.signal { padding: 20px 18px; border-right: 1px solid #504b56; }
.signal:last-child { border-right: 0; }
.signal strong { display: block; color: var(--yellow); font-size: 20px; }
.signal span { font-size: 13px; color: #cfccd2; }

section { padding: 88px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 36px; }
.section-kicker { display: block; margin-bottom: 7px; color: var(--coral-dark); font-size: 13px; font-weight: 900; text-transform: uppercase; }
h2 { font-size: clamp(31px, 4vw, 48px); }
.text-link { border-bottom: 2px solid var(--coral); font-weight: 900; }

.feature-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 16px; }
.feature-card { min-height: 230px; padding: 28px; background: var(--white); border: 2px solid var(--ink); border-radius: var(--radius); box-shadow: 5px 5px 0 rgba(23,21,29,.14); }
.feature-card:first-child { grid-row: span 2; min-height: 476px; display: flex; flex-direction: column; justify-content: space-between; background: var(--coral); color: #fff; box-shadow: 6px 6px 0 var(--ink); }
.feature-card:nth-child(3) { background: var(--yellow); }
.feature-card:nth-child(4) { background: var(--aqua); }
.feature-number { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 36px; border: 2px solid currentColor; border-radius: 50%; font-weight: 1000; }
.feature-card h3 { margin-bottom: 12px; font-size: 24px; }
.feature-card p { margin: 0; }
.feature-card:first-child .feature-art { height: 190px; margin-top: 28px; background: repeating-linear-gradient(-45deg, transparent 0 14px, rgba(255,255,255,.16) 14px 28px); border: 2px solid var(--ink); display: grid; place-items: center; color: var(--ink); font-size: 70px; font-weight: 1000; }

.preview-band { background: #dff6f2; border-block: 2px solid var(--ink); }
.preview-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; align-items: end; }
.preview-item { margin: 0; }
.preview-frame { position: relative; width: min(100%, 400px); margin-inline: auto; padding: 10px; background: #fff; border: 2px solid var(--ink); box-shadow: var(--shadow); }
.preview-frame img { width: 100%; max-width: 400px; margin-inline: auto; }
.preview-item:nth-child(2) .preview-frame { transform: translateY(-20px) rotate(-1deg); }
.preview-item figcaption { margin-top: 20px; font-weight: 900; text-align: center; }

.route-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.route-card { position: relative; min-height: 260px; padding: 34px; overflow: hidden; border: 2px solid var(--ink); border-radius: var(--radius); box-shadow: var(--shadow); }
.route-card:first-child { background: var(--yellow); }
.route-card:last-child { background: #fff; }
.route-card::after { content: attr(data-index); position: absolute; right: 18px; bottom: -30px; color: rgba(23,21,29,.09); font-size: 150px; font-weight: 1000; line-height: 1; }
.route-card h3 { max-width: 360px; margin-bottom: 16px; font-size: 30px; }
.route-card p { max-width: 440px; margin: 0 0 26px; }

.review-section { background: var(--ink); color: #fff; }
.review-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; align-items: start; }
.review-score { position: sticky; top: 110px; }
.review-score strong { display: block; color: var(--yellow); font-size: 82px; line-height: 1; }
.review-score span { color: #c8c4cb; }
.quotes { display: grid; gap: 16px; }
blockquote { margin: 0; padding: 26px; color: var(--ink); background: var(--paper); border: 2px solid #fff; border-radius: var(--radius); }
blockquote p { margin: 0 0 14px; font-size: 17px; }
blockquote cite { color: var(--coral-dark); font-style: normal; font-weight: 900; }
.review-disclaimer { margin-top: 14px; color: #aaa5ae; font-size: 12px; }

.faq-list { border-top: 2px solid var(--ink); }
.faq-item { border-bottom: 2px solid var(--ink); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; border: 0; color: var(--ink); background: transparent; font: inherit; font-weight: 900; text-align: left; cursor: pointer; }
.faq-question span:last-child { width: 30px; height: 30px; display: grid; place-items: center; flex: 0 0 30px; border: 2px solid var(--ink); border-radius: 50%; }
.faq-answer { display: none; max-width: 900px; padding: 0 50px 22px 0; color: var(--muted); }
.faq-item.open .faq-answer { display: block; }
.faq-item.open .faq-question span:last-child { background: var(--yellow); transform: rotate(45deg); }
.faq-answer p { margin: 0; }

.download-band { padding: 0 0 88px; }
.download-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; padding: 46px; color: #fff; background: var(--blue); border: 2px solid var(--ink); box-shadow: var(--shadow); }
.download-panel h2 { max-width: 700px; font-size: clamp(31px,4vw,52px); }
.download-panel p { margin: 12px 0 0; color: #dbe6f6; }
.download-panel .btn { color: var(--ink); background: var(--yellow); min-width: 160px; }

.page-hero { padding: 78px 0 54px; border-bottom: 2px solid var(--ink); background: linear-gradient(90deg, var(--paper) 0 72%, var(--yellow) 72%); }
.breadcrumbs { display: flex; gap: 8px; margin-bottom: 24px; color: var(--muted); font-size: 14px; }
.page-hero h1 { max-width: 900px; font-size: clamp(39px,6vw,68px); }
.page-hero .lead { max-width: 760px; }
.content-layout { display: grid; grid-template-columns: 250px minmax(0,1fr); gap: 52px; align-items: start; }
.side-nav { position: sticky; top: 104px; padding: 20px; background: #fff; border: 2px solid var(--ink); box-shadow: 4px 4px 0 var(--ink); }
.side-nav strong { display: block; margin-bottom: 12px; }
.side-nav a { display: block; padding: 9px 0; color: var(--muted); border-top: 1px solid var(--line); font-size: 14px; }
.article section { padding: 0 0 70px; scroll-margin-top: 110px; }
.article h2 { margin-bottom: 24px; font-size: 34px; }
.article h3 { margin: 28px 0 9px; font-size: 22px; }
.article p { margin: 0 0 16px; }
.article a:not(.btn) { color: var(--coral-dark); border-bottom: 1px solid currentColor; font-weight: 700; }
.notice { padding: 20px 22px; margin: 22px 0; background: #fff7d8; border-left: 6px solid var(--yellow); border-block: 2px solid var(--ink); border-right: 2px solid var(--ink); }
.steps { counter-reset: step; display: grid; gap: 20px; }
.step { position: relative; padding: 28px 28px 28px 92px; background: #fff; border: 2px solid var(--ink); box-shadow: 4px 4px 0 rgba(23,21,29,.16); }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 24px; top: 28px; width: 44px; height: 44px; display: grid; place-items: center; background: var(--coral); color: #fff; border: 2px solid var(--ink); border-radius: 50%; font-weight: 1000; }
.step h3 { margin: 0 0 8px; }
.step p:last-child { margin-bottom: 0; }
.checklist { padding: 0; margin: 20px 0; list-style: none; }
.checklist li { position: relative; padding: 10px 0 10px 34px; border-bottom: 1px solid var(--line); }
.checklist li::before { content: "✓"; position: absolute; left: 2px; color: var(--coral-dark); font-weight: 1000; }
.matrix { width: 100%; border-collapse: collapse; background: #fff; }
.matrix th,.matrix td { padding: 15px; border: 2px solid var(--ink); text-align: left; vertical-align: top; }
.matrix th { background: var(--yellow); }
.tip-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
.tip { padding: 24px; border: 2px solid var(--ink); background: #fff; }
.tip:nth-child(2n) { background: #dff6f2; }
.tip h3 { margin-top: 0; }

.site-footer { padding: 46px 0 28px; color: #cfccd2; background: var(--ink); border-top: 2px solid var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: start; }
.footer-brand { color: #fff; }
.footer-brand p { max-width: 560px; color: #aaa5ae; }
.footer-links { display: flex; flex-wrap: wrap; gap: 24px; color: #fff; font-weight: 700; }
.disclaimer { margin: 30px 0 0; padding-top: 22px; border-top: 1px solid #45414a; color: #918c96; font-size: 12px; }
.copyright { margin: 8px 0 0; color: #77717d; font-size: 12px; }

@media (max-width: 900px) {
  .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 20px; background: var(--paper); border-bottom: 2px solid var(--ink); flex-direction: column; align-items: stretch; gap: 10px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; }
  .menu-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 38px; padding-top: 56px; }
  .hero-visual { min-height: 480px; }
  .signal-grid { grid-template-columns: repeat(2,1fr); }
  .signal:nth-child(2) { border-right: 0; }
  .signal:nth-child(-n+2) { border-bottom: 1px solid #504b56; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-card:first-child { grid-column: span 2; grid-row: auto; min-height: 370px; }
  .content-layout { grid-template-columns: 1fr; }
  .side-nav { position: static; display: none; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 24px), var(--max)); }
  .hero::after { display: none; }
  h1 { font-size: 46px; }
  .hero-grid { min-height: auto; padding: 46px 0; }
  .lead { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .burst { right: 0; top: 18px; width: 96px; font-size: 13px; }
  .visual-ticket { left: 8px; }
  section { padding: 62px 0; }
  .section-head { align-items: start; flex-direction: column; }
  .feature-grid, .preview-grid, .route-grid, .review-grid, .tip-grid { grid-template-columns: 1fr; }
  .feature-card:first-child { grid-column: auto; }
  .preview-item:nth-child(2) .preview-frame { transform: none; }
  .review-score { position: static; }
  .download-panel { grid-template-columns: 1fr; padding: 30px 24px; }
  .download-panel .btn { width: 100%; }
  .page-hero { padding: 52px 0 40px; background: var(--paper); }
  .page-hero h1 { font-size: 41px; }
  .step { padding: 84px 22px 24px; }
  .matrix { font-size: 14px; }
  .matrix th,.matrix td { padding: 10px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { gap: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { transition: none !important; }
}