/* =====================================================
   5cm.fun — v3 编辑部排版设计系统
   纸白底 · 墨蓝正文 · 单一品牌蓝 · 真实截图当主角
   仅 index.html / weather.html 使用；download / compliance 仍用 style-new.css
   ===================================================== */

/* 1. Tokens */
:root {
  --paper: #F5F1E8;
  --paper-2: #ECE7DA;
  --paper-3: #E1DBCB;
  --ink: #131C2E;
  --ink-2: #3E4759;
  --ink-3: #6F7789;
  --rule: #D5CFC0;
  --rule-strong: #B7B09F;
  --blue: #2A63E8;
  --blue-ink: #1B4DC0;
  --blue-soft: #DCE5FA;
  --catch: #CF5228;
  --font-cjk: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-serif: Georgia, "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --container: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --nav-h: 64px;
}

/* 2. Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-cjk);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

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

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--ink); color: var(--paper); padding: 8px 16px; z-index: 9999; text-decoration: none; }
.skip-link:focus { left: 0; }

/* 3. Typography */
h1, h2, h3, h4 { font-weight: 600; line-height: 1.15; letter-spacing: -0.01em; }
.serif { font-family: var(--font-serif); }

.eyebrow {
  display: flex; align-items: baseline; gap: 0.9rem;
  color: var(--ink-3); font-size: 0.8125rem; letter-spacing: 0.12em; text-transform: uppercase;
}
.eyebrow .num { font-family: var(--font-serif); font-size: 1.9rem; line-height: 1; color: var(--ink); letter-spacing: 0; }
.eyebrow::after { content: ''; flex: 1; height: 1px; background: var(--rule); align-self: center; }

.section-head { margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head h2 { font-size: clamp(1.75rem, 3.6vw, 2.75rem); margin-top: 1.25rem; max-width: 20ch; }
.section-head p { color: var(--ink-2); margin-top: 0.75rem; max-width: 46ch; }

.lede { font-size: clamp(1.0625rem, 1.5vw, 1.25rem); color: var(--ink-2); line-height: 1.7; max-width: 30em; }

/* 4. Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 1.4rem; border: 1px solid var(--ink); border-radius: 4px;
  font-weight: 500; font-size: 0.95rem; line-height: 1; text-decoration: none; cursor: pointer;
  white-space: nowrap; background: transparent;
  transition: background 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #000; transform: translateY(-1px); }
.btn-ghost { color: var(--ink); }
.btn-ghost:hover { background: var(--paper-2); }
.btn svg { width: 16px; height: 16px; }
.textlink {
  display: inline-flex; align-items: center; gap: 0.35rem;
  color: var(--blue-ink); text-decoration: none; font-weight: 500;
  border-bottom: 1px solid transparent; transition: border-color 180ms var(--ease);
}
.textlink:hover { border-color: currentColor; }

/* 5. Navbar */
.navbar {
  position: sticky; top: 0; z-index: 100; height: var(--nav-h);
  background: rgba(245, 241, 232, 0.94); border-bottom: 1px solid var(--rule);
  display: flex; align-items: center;
}
.navbar.scrolled { border-bottom-color: var(--rule-strong); }
.nav-wrapper { display: flex; align-items: center; gap: 2rem; width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.logo { display: flex; align-items: center; gap: 0.6rem; font-weight: 600; font-size: 1.125rem; text-decoration: none; flex-shrink: 0; }
.logo img { width: 28px; height: 28px; border-radius: 6px; }
.nav-links { display: flex; gap: 1.75rem; margin-left: auto; }
.nav-links a { text-decoration: none; font-size: 0.925rem; color: var(--ink-2); padding: 0.25rem 0; border-bottom: 1px solid transparent; transition: color 180ms var(--ease), border-color 180ms var(--ease); }
.nav-links a:hover { color: var(--ink); }
.nav-links a.nav-current { color: var(--ink); border-bottom-color: var(--ink); }
.nav-cta { padding: 0.6rem 1.1rem; font-size: 0.875rem; }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }

.mobile-nav {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 99;
  background: var(--paper); border-bottom: 1px solid var(--rule); padding: 0.5rem var(--gutter) 1.25rem;
  flex-direction: column;
}
.mobile-nav.active { display: flex; }
.mobile-nav a { padding: 0.9rem 0; text-decoration: none; border-bottom: 1px solid var(--rule); font-size: 1.05rem; }
.mobile-nav a.nav-current { color: var(--blue-ink); }
.mobile-nav .btn { margin-top: 1rem; justify-content: center; }
.mobile-nav-overlay { display: none; position: fixed; inset: 0; z-index: 98; background: rgba(19, 28, 46, 0.35); }
.mobile-nav-overlay.active { display: block; }

/* 6. Hero */
.hero { border-bottom: 1px solid var(--ink); overflow: hidden; }
.hero-grid {
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: 1.5rem;
  align-items: end; min-height: min(78vh, 720px);
}
.hero-text { grid-column: 1 / 8; padding: clamp(3rem, 8vw, 6rem) 0 clamp(3rem, 6vw, 5rem); }
.kicker { font-family: var(--font-serif); font-style: italic; color: var(--ink-3); font-size: 1rem; letter-spacing: 0.02em; }
.hero-text h1 { font-size: clamp(2.75rem, 7vw, 5.25rem); line-height: 1.08; letter-spacing: -0.02em; margin: 1.25rem 0 1.5rem; }
.hero-cta { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; margin-top: 2rem; }
.hero-note { margin-top: 1rem; font-size: 0.85rem; color: var(--ink-3); }

.hero-device { grid-column: 8 / 13; align-self: end; justify-self: center; height: clamp(360px, 46vw, 560px); overflow: hidden; display: flex; align-items: flex-start; }

.device {
  width: 300px; flex-shrink: 0;
  border: 9px solid var(--ink); border-radius: 44px; background: var(--ink);
  overflow: hidden; box-shadow: 0 30px 60px -30px rgba(19, 28, 46, 0.45);
}
.device img { width: 100%; }
.device--open { border-bottom: 0; border-radius: 44px 44px 0 0; box-shadow: none; }

/* 7. Fact line（替代凑数的数据栏）*/
.factline { display: flex; flex-wrap: wrap; gap: 0.75rem 3rem; padding: 1.25rem 0; border-bottom: 1px solid var(--rule); }
.fact { display: flex; align-items: baseline; gap: 0.5rem; font-size: 0.9rem; color: var(--ink-3); }
.fact b { font-family: var(--font-serif); font-weight: 400; font-size: 1.5rem; color: var(--ink); letter-spacing: -0.01em; }

/* 8. Sections */
.section { padding: clamp(4rem, 9vw, 7.5rem) 0; }
.section + .section { border-top: 1px solid var(--rule); }
.section--tint { background: var(--paper-2); }

/* 9. 渔获墙 */
.wall-track {
  display: flex; gap: 0.75rem; overflow-x: auto; overscroll-behavior-x: contain;
  padding: 0.25rem var(--gutter) 1rem; scroll-snap-type: x proximity; scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.wall-track::-webkit-scrollbar { display: none; }
.wall-item { flex: 0 0 auto; scroll-snap-align: start; }
.wall-item img { height: 280px; width: auto; border-radius: 4px; }
.wall-item figcaption { margin-top: 0.5rem; font-size: 0.8125rem; color: var(--ink-3); }
.wall-item figcaption b { color: var(--ink); font-weight: 500; }
.wall-more {
  flex: 0 0 auto; width: 200px; height: 280px; border: 1px solid var(--rule-strong); border-radius: 4px;
  display: flex; flex-direction: column; justify-content: flex-end; padding: 1.25rem; text-decoration: none; color: var(--ink);
  transition: background 180ms var(--ease);
}
.wall-more:hover { background: var(--paper-2); }
.wall-more span { font-family: var(--font-serif); font-size: 1.6rem; line-height: 1.1; }
.wall-more small { color: var(--ink-3); margin-top: 0.5rem; }

/* 10. Spreads（编号大标题 + 单张大截图，左右交替）*/
.spread {
  display: grid; grid-template-columns: repeat(12, 1fr); column-gap: 1.5rem; align-items: center;
  padding: clamp(2.5rem, 6vw, 5rem) 0;
}
.spread + .spread { border-top: 1px solid var(--rule); }
.spread-text { grid-column: 1 / 6; }
.spread-media { grid-column: 7 / 13; }
.spread--flip .spread-text { grid-column: 8 / 13; }
.spread--flip .spread-media { grid-column: 1 / 7; grid-row: 1; }
.spread .num { font-family: var(--font-serif); font-size: 3.5rem; line-height: 1; color: var(--ink-3); }
.spread h3 { font-size: clamp(1.5rem, 2.8vw, 2.125rem); margin: 0.75rem 0 1rem; }
.spread p { color: var(--ink-2); max-width: 34em; }
.detail-list { margin-top: 1.5rem; border-top: 1px solid var(--rule); }
.detail-list li { padding: 0.7rem 0; border-bottom: 1px solid var(--rule); font-size: 0.95rem; display: flex; gap: 0.75rem; }
.detail-list li::before { content: '—'; color: var(--ink-3); }

/* 版面「图版」：截图放在错位的纸色色块上，制造非对称 */
.plate { position: relative; display: flex; justify-content: center; padding: 2.5rem 0; }
.plate::before { content: ''; position: absolute; inset: 0 12% 0 0; background: var(--paper-2); z-index: 0; }
.spread--flip .plate::before { inset: 0 0 0 12%; }
.plate > * { position: relative; z-index: 1; }
.plate img.flat { width: min(100%, 520px); max-height: 640px; object-fit: cover; object-position: top; border-radius: 8px; box-shadow: 0 24px 50px -28px rgba(19, 28, 46, 0.5); }
.section--tint .plate::before { background: var(--paper-3); }

/* 11. 次要功能（两台小机 + 无图标清单）*/
.pair { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: 1.5rem; row-gap: 2.5rem; align-items: start; }
.pair-item { grid-column: span 6; display: grid; grid-template-columns: auto 1fr; gap: 1.5rem; align-items: center; }
.pair-item h3 { font-size: 1.25rem; margin-bottom: 0.4rem; }
.pair-item p { color: var(--ink-2); font-size: 0.95rem; }
.pair-item .device { height: 300px; width: 150px; border-width: 6px; border-radius: 24px; }

.list-grid { display: grid; grid-template-columns: repeat(4, 1fr); column-gap: 2rem; border-top: 1px solid var(--ink); margin-top: 3rem; }
.list-grid > * { padding: 1.25rem 0 1.5rem; border-bottom: 1px solid var(--rule); text-decoration: none; color: inherit; }
.list-grid h4 { font-size: 1.05rem; margin-bottom: 0.35rem; }
.list-grid p { font-size: 0.9rem; color: var(--ink-2); }
.list-grid .num { font-family: var(--font-serif); color: var(--ink-3); font-size: 0.85rem; display: block; margin-bottom: 0.5rem; }

/* 12. 钓友评价（一大两小引文，无卡片）*/
.quotes { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: 1.5rem; }
.quote-lead { grid-column: 1 / 8; }
.quote-side { grid-column: 9 / 13; display: flex; flex-direction: column; }
.quote { position: relative; padding-top: 1.5rem; }
.quote::before { content: '\201C'; font-family: var(--font-serif); font-size: 4rem; line-height: 0.6; color: var(--rule-strong); position: absolute; top: 1.5rem; left: -0.05em; }
.quote p { padding-left: 2.5rem; }
.quote-lead .quote p { font-size: clamp(1.25rem, 2.2vw, 1.75rem); line-height: 1.55; letter-spacing: -0.005em; }
.quote-side .quote { padding: 1.5rem 0; border-top: 1px solid var(--rule); }
.quote-side .quote::before { font-size: 2.6rem; }
.quote-side .quote p { font-size: 0.975rem; color: var(--ink-2); padding-left: 1.75rem; }
.quote-side .quote:first-child { padding-top: 0.25rem; border-top: 0; }
.quote-side .quote:first-child::before { top: 0.25rem; }
.cite { display: flex; gap: 0.75rem; align-items: baseline; margin-top: 1rem; padding-left: 2.5rem; font-size: 0.85rem; color: var(--ink-3); }
.quote-side .cite { padding-left: 1.75rem; }
.cite b { font-weight: 500; color: var(--ink); }
.cite .stars { color: var(--catch); letter-spacing: 0.05em; }

/* 13. 下载（表格式行，不做三张卡）*/
.dl-list { border-top: 1px solid var(--ink); }
.dl-row {
  display: grid; grid-template-columns: 64px 1fr auto auto; column-gap: 2rem; align-items: center;
  padding: 1.75rem 0; border-bottom: 1px solid var(--rule);
}
.dl-row--lead { padding: 2.25rem 0; }
.dl-row .app-icon { width: 64px; height: 64px; border-radius: 14px; }
.dl-row h3 { font-size: 1.2rem; display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.dl-row--lead h3 { font-size: 1.5rem; }
.tag { font-family: var(--font-serif); font-style: italic; font-weight: 400; font-size: 0.85rem; color: var(--catch); }
.dl-row .app-desc { color: var(--ink-2); font-size: 0.95rem; margin-top: 0.2rem; }
.dl-row .version { font-size: 0.8rem; color: var(--ink-3); margin-top: 0.35rem; }
.dl-row .stores { font-size: 0.8rem; color: var(--ink-3); margin-top: 0.35rem; }
.dl-row .stores a { color: var(--blue-ink); text-decoration: none; }
.dl-row .links { display: flex; gap: 1rem; margin-top: 0.5rem; font-size: 0.85rem; }
.dl-actions { display: flex; flex-direction: column; align-items: stretch; gap: 0.5rem; }
.dl-qr { text-align: center; font-size: 0.75rem; color: var(--ink-3); }
.dl-qr img { width: 88px; height: 88px; border-radius: 4px; border: 1px solid var(--rule); margin-bottom: 0.3rem; }

/* 14. 关于 */
.about-grid { display: grid; grid-template-columns: repeat(12, 1fr); column-gap: 1.5rem; }
.about-text { grid-column: 1 / 8; }
.about-text p { color: var(--ink-2); }
.about-text p + p { margin-top: 1rem; }
.about-text a { color: var(--blue-ink); text-decoration: none; }
.about-text a:hover { text-decoration: underline; }
.facts { grid-column: 9 / 13; border-top: 1px solid var(--ink); }
.facts div { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 0.85rem 0; border-bottom: 1px solid var(--rule); font-size: 0.9rem; }
.facts dt { color: var(--ink-3); }
.facts dd { font-family: var(--font-serif); font-size: 1.15rem; }

/* 15. FAQ（weather 页）*/
.faq { border-top: 1px solid var(--ink); max-width: 760px; }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { list-style: none; cursor: pointer; padding: 1.1rem 0; font-weight: 500; display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font-family: var(--font-serif); font-size: 1.4rem; line-height: 1; color: var(--ink-3); flex-shrink: 0; }
.faq details[open] summary::after { content: '\2212'; }
.faq details p { padding: 0 0 1.25rem; color: var(--ink-2); font-size: 0.95rem; max-width: 60ch; }

/* 16. Footer（版权页式，纸色）*/
.footer { border-top: 1px solid var(--ink); background: var(--paper-2); padding: 3rem 0 2rem; font-size: 0.875rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.footer .logo-desc { color: var(--ink-2); margin-top: 0.75rem; max-width: 28em; }
.footer h4 { font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 0.9rem; font-weight: 500; }
.footer li { margin-bottom: 0.45rem; }
.footer li a { text-decoration: none; color: var(--ink-2); }
.footer li a:hover { color: var(--ink); }
.footer-bottom { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; color: var(--ink-3); font-size: 0.8rem; }
.footer-bottom a { color: inherit; text-decoration: none; }

/* 17. 首屏入场（唯一的动效编排）*/
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.rise { animation: rise 900ms var(--ease) both; animation-delay: calc(var(--i, 0) * 90ms); }
@keyframes riseDevice { from { opacity: 0; transform: translateY(60px); } to { opacity: 1; transform: none; } }
.hero-device .device { animation: riseDevice 1100ms var(--ease) 250ms both; }

@media (prefers-reduced-motion: reduce) {
  .rise, .hero-device .device { animation: none; }
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

/* 18. Responsive */
@media (max-width: 960px) {
  .hero-grid { min-height: 0; }
  .hero-text { grid-column: 1 / 13; padding-bottom: 2rem; }
  .hero-device { grid-column: 1 / 13; height: clamp(300px, 60vw, 420px); }
  .spread-text, .spread--flip .spread-text { grid-column: 1 / 13; }
  .spread-media, .spread--flip .spread-media { grid-column: 1 / 13; grid-row: auto; margin-top: 2rem; }
  .plate::before, .spread--flip .plate::before { inset: 0 0 0 0; }
  .pair-item { grid-column: span 12; }
  .list-grid { grid-template-columns: repeat(2, 1fr); }
  .quote-lead, .quote-side { grid-column: 1 / 13; }
  .quote-side { margin-top: 2rem; }
  .quote-side .quote:first-child { border-top: 1px solid var(--rule); padding-top: 1.5rem; }
  .quote-side .quote:first-child::before { top: 1.5rem; }
  .about-text, .facts { grid-column: 1 / 13; }
  .facts { margin-top: 2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-cta { margin-left: auto; }
  .hero-text h1 { font-size: clamp(2.5rem, 12vw, 3.5rem); }
  .factline { gap: 0.5rem 1.5rem; }
  .fact { flex-basis: calc(50% - 0.75rem); }
  .wall-item img { height: 200px; }
  .wall-more { height: 200px; width: 150px; }
  .device { width: 260px; }
  .pair-item { grid-template-columns: 1fr; }
  .pair-item .device { width: 150px; }
  .dl-row { grid-template-columns: 48px 1fr; column-gap: 1rem; row-gap: 1rem; }
  .dl-row .app-icon { width: 48px; height: 48px; border-radius: 11px; align-self: start; }
  .dl-actions { grid-column: 1 / -1; }
  .dl-actions .btn { justify-content: center; }
  .dl-qr { display: none; } /* 手机上扫不了自己的屏幕，二维码无意义；按钮直接跳下载 */
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 480px) {
  .list-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* 19. 下载二维码弹窗（download-handler.js 在桌面端动态创建）*/
.qrcode-modal { position: fixed; inset: 0; z-index: 9999; display: none; }
.qrcode-modal.active { display: flex; align-items: center; justify-content: center; }
.qrcode-overlay { position: absolute; inset: 0; background: rgba(19, 28, 46, 0.6); }
.qrcode-content { position: relative; background: var(--paper); border: 1px solid var(--ink); border-radius: 8px; padding: 2rem; max-width: 400px; width: 90%; text-align: center; animation: rise 300ms var(--ease); }
.qrcode-close { position: absolute; top: 0.5rem; right: 0.75rem; background: none; border: 0; font-size: 1.75rem; color: var(--ink-3); cursor: pointer; line-height: 1; }
.qrcode-close:hover { color: var(--ink); }
.qrcode-app-icon { display: flex; justify-content: center; margin-bottom: 1rem; }
.qrcode-app-icon img { width: 56px; height: 56px; border-radius: 12px; }
.qrcode-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 1rem; }
.qrcode-image-container { display: inline-block; padding: 0.5rem; background: #fff; border: 1px solid var(--rule); border-radius: 4px; margin-bottom: 0.75rem; }
.qrcode-image-container img { width: 220px; height: 220px; display: block; }
.qrcode-desc { color: var(--ink-2); font-size: 0.9rem; }
.qrcode-app-info { margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--rule); font-weight: 500; }
.qrcode-tip { margin-top: 0.75rem; font-size: 0.85rem; color: var(--ink-3); }
.qrcode-tip strong { color: var(--ink); font-weight: 500; }
@media (max-width: 760px) { .qrcode-modal { display: none !important; } }

/* main-new.js 里的 contactModal 兜底（页面上保留了空壳）*/
.modal { display: none; position: fixed; inset: 0; z-index: 1000; background: rgba(19, 28, 46, 0.5); align-items: center; justify-content: center; }
.modal-content { background: var(--paper); border-radius: 8px; padding: 2rem; max-width: 400px; width: 90%; position: relative; }
.modal-close { position: absolute; top: 0.75rem; right: 1rem; background: none; border: 0; font-size: 1.5rem; cursor: pointer; color: var(--ink-3); }