:root {
  --ink: #17221d;
  --muted: #5d6b64;
  --line: #dbe3de;
  --paper: #ffffff;
  --soft: #f4f7f5;
  --green: #176b4d;
  --green-dark: #0d4d37;
  --amber: #d89422;
  --radius: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; }
.container, .header-inner, .hero-inner { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 30px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; }
.brand img { border-radius: 8px; }
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.main-nav a { color: #425149; font-size: 15px; padding: 24px 0 20px; border-bottom: 3px solid transparent; }
.main-nav a:hover, .main-nav a.active { color: var(--green); border-bottom-color: var(--green); }
.header-download, .primary-button, .secondary-button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 0 22px; border-radius: 6px; font-weight: 700; }
.header-download, .primary-button { background: var(--green); color: #fff; }
.header-download:hover, .primary-button:hover { background: var(--green-dark); }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 6px; cursor: pointer; }

.hero { background: linear-gradient(180deg, #f7faf8 0%, #eef4f0 100%); border-bottom: 1px solid var(--line); }
.hero-inner { min-height: 680px; padding: 60px 0 54px; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(400px, .98fr); align-items: center; gap: 76px; }
.eyebrow { color: var(--green); font-size: 13px; font-weight: 800; letter-spacing: 0; margin-bottom: 14px; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { max-width: 620px; margin-bottom: 22px; font-size: clamp(42px, 5vw, 66px); line-height: 1.12; letter-spacing: 0; }
.hero-copy > p { max-width: 650px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin: 30px 0 34px; }
.text-link { color: var(--green); font-weight: 700; }
.hero-facts { display: flex; gap: 44px; margin: 0; }
.hero-facts div { border-left: 3px solid var(--amber); padding-left: 12px; }
.hero-facts dt { color: var(--muted); font-size: 12px; }
.hero-facts dd { margin: 2px 0 0; font-weight: 700; }
.hero-media { min-height: 510px; position: relative; display: flex; align-items: center; justify-content: center; padding: 34px 54px 34px 86px; }
.phone-frame { position: relative; z-index: 2; width: 264px; padding: 8px; background: #111915; border-radius: 28px; box-shadow: 0 24px 55px rgba(23,34,29,.2); }
.phone-frame img { width: 100%; border-radius: 21px; }
.week-board { position: absolute; z-index: 1; left: 0; top: 68px; width: 170px; padding: 10px; display: grid; gap: 8px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 35px rgba(23,34,29,.1); }
.week-board span { padding: 8px 10px; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 13px; }
.week-board span:last-child { border-bottom: 0; }
.week-board .current { color: #fff; background: var(--green); border-radius: 4px; }
.media-note { position: absolute; z-index: 3; right: 0; bottom: 70px; width: 210px; padding: 14px 16px; display: grid; background: #fff; border-left: 4px solid var(--amber); box-shadow: 0 12px 35px rgba(23,34,29,.12); }
.media-note span { color: var(--muted); font-size: 13px; }

.section { padding: 84px 0; }
.section-heading { margin-bottom: 34px; }
.section-heading h2 { margin-bottom: 0; font-size: clamp(29px, 3vw, 40px); line-height: 1.25; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature-grid article { min-height: 260px; padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 30px rgba(23,34,29,.05); }
.feature-grid .number { display: block; color: var(--amber); font-weight: 800; margin-bottom: 36px; }
.feature-grid h3 { margin-bottom: 10px; font-size: 21px; }
.feature-grid p { margin-bottom: 0; color: var(--muted); }
.schedule-section { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.schedule-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 64px; align-items: center; }
.schedule-list { display: grid; gap: 0; border-top: 1px solid #cbd8d0; }
.schedule-list div { display: grid; grid-template-columns: 100px 1fr; gap: 22px; padding: 22px 0; border-bottom: 1px solid #cbd8d0; }
.schedule-list span { color: var(--green); font-weight: 800; }
.route-panel { padding: 34px; background: var(--green-dark); color: #fff; border-radius: var(--radius); }
.route-panel .panel-label { color: #b8d8ca; font-size: 13px; font-weight: 700; }
.route-panel h3 { font-size: 25px; line-height: 1.35; }
.route-panel p { color: #d6e6df; }
.route-panel a { color: #fff3cd; font-weight: 700; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.gallery-grid figure { margin: 0; display: grid; grid-template-columns: minmax(0, 180px) 1fr; align-items: center; gap: 20px; padding: 20px; background: var(--soft); border-radius: var(--radius); }
.gallery-grid figure img { width: 180px; max-width: 400px; border-radius: 6px; box-shadow: 0 12px 28px rgba(23,34,29,.12); }
.gallery-grid figcaption { display: grid; gap: 8px; }
.gallery-grid figcaption span { color: var(--muted); font-size: 14px; }
.faq-preview { background: #fff8e8; border-top: 1px solid #eadcb8; }
.faq-preview-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.faq-preview .section-heading { margin-bottom: 12px; }
.faq-preview p { max-width: 750px; margin-bottom: 0; color: #625b4e; }
.secondary-button { color: var(--green); background: #fff; border: 1px solid var(--green); white-space: nowrap; }
.download-band { padding: 50px 0; color: #fff; background: var(--green); }
.download-band .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.download-band span { color: #bce0cf; font-size: 13px; }
.download-band h2 { margin-bottom: 0; font-size: 29px; }
.primary-button.light { color: var(--green-dark); background: #fff; }
.site-footer { padding: 30px 0; color: #66736c; background: #101813; text-align: center; font-size: 13px; }
.site-footer p { margin: 4px 0; }

.inner-main { background: #fff; }
.inner-hero { padding: 72px 0 64px; background: var(--soft); border-bottom: 1px solid var(--line); }
.inner-hero h1 { margin-bottom: 14px; font-size: clamp(36px, 5vw, 56px); line-height: 1.2; }
.inner-hero p { max-width: 760px; margin-bottom: 0; color: var(--muted); font-size: 17px; }
.article-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); justify-content: space-between; gap: 70px; }
.article-index { position: sticky; top: 100px; align-self: start; display: grid; gap: 12px; padding: 22px; background: var(--soft); border: 1px solid var(--line); border-radius: var(--radius); }
.article-index a { color: var(--muted); }
.article-index a:hover { color: var(--green); }
.article-content section { padding: 0 0 48px; margin-bottom: 48px; border-bottom: 1px solid var(--line); }
.article-content h2 { font-size: 30px; }
.article-content p, .article-content li { color: #46534c; }
.article-content li { margin-bottom: 12px; }
.step-tag { display: inline-block; margin-bottom: 12px; color: var(--green); font-size: 13px; font-weight: 800; }
.faq-layout { display: grid; grid-template-columns: 300px minmax(0, 760px); justify-content: space-between; gap: 70px; }
.faq-intro { align-self: start; padding: 28px; color: #fff; background: var(--green-dark); border-radius: var(--radius); }
.faq-intro h2 { font-size: 27px; }
.faq-intro p { color: #d6e6df; }
.faq-intro a { color: #fff3cd; font-weight: 700; }
.accordion-list { border-top: 1px solid var(--line); }
.accordion-list details { border-bottom: 1px solid var(--line); }
.accordion-list summary { cursor: pointer; padding: 22px 44px 22px 0; font-size: 18px; font-weight: 700; }
.accordion-list details p { padding: 0 44px 22px 0; margin: 0; color: var(--muted); }

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr 420px; gap: 30px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-grid figure { grid-template-columns: 160px 1fr; }
}

@media (max-width: 760px) {
  .container, .header-inner, .hero-inner { width: min(100% - 28px, 1160px); }
  .header-inner { min-height: 64px; }
  .menu-button { display: inline-grid; place-items: center; margin-left: auto; }
  .header-download { display: none; }
  .main-nav { display: none; position: absolute; top: 64px; left: 14px; right: 14px; padding: 10px; background: #fff; border: 1px solid var(--line); box-shadow: 0 18px 40px rgba(23,34,29,.14); }
  .main-nav.open { display: grid; }
  .main-nav a { padding: 12px; border: 0; border-radius: 4px; }
  .main-nav a.active { background: var(--soft); }
  .hero-inner { min-height: auto; padding: 38px 0 18px; grid-template-columns: 1fr; gap: 18px; }
  .hero h1 { font-size: clamp(38px, 12vw, 52px); }
  .hero-copy > p { font-size: 15px; }
  .hero-actions { margin: 24px 0; }
  .hero-facts { display: none; }
  .hero-media { min-height: 250px; padding: 8px 48px 8px 60px; }
  .phone-frame { width: 140px; border-radius: 18px; }
  .phone-frame img { border-radius: 17px; }
  .week-board { top: 18px; width: 104px; }
  .week-board span { padding: 6px; font-size: 11px; }
  .media-note { bottom: 16px; width: 142px; padding: 9px; }
  .section { padding: 58px 0; }
  .feature-grid, .schedule-layout, .article-layout, .faq-layout { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid article { min-height: 220px; }
  .article-index { position: static; }
  .gallery-grid figure { grid-template-columns: 132px 1fr; padding: 14px; }
  .gallery-grid figure img { width: 132px; }
  .faq-preview-inner, .download-band .container { align-items: flex-start; flex-direction: column; }
  .download-band h2 { font-size: 24px; }
  .inner-hero { padding: 54px 0 46px; }
  .accordion-list summary { padding-right: 18px; }
  .accordion-list details p { padding-right: 18px; }
}

@media (max-width: 390px) {
  .brand span { font-size: 17px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .hero-media { min-height: 248px; padding-right: 30px; }
  .phone-frame { width: 138px; }
  .week-board { left: -4px; }
  .media-note { right: -2px; }
  .feature-grid { grid-template-columns: 1fr; }
  .gallery-grid figure { grid-template-columns: 112px 1fr; gap: 14px; }
  .gallery-grid figure img { width: 112px; }
}