:root {
  --ink: #172033;
  --ink-soft: #5f6b7a;
  --paper: #f6f8fa;
  --white: #ffffff;
  --red: #c9364f;
  --mint: #dcefe9;
  --line: #e1e6eb;
  --shadow: 0 16px 34px rgba(23, 32, 51, 0.12);
}

* {
  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: 1.72;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.shell {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(243, 246, 248, 0.96);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 6px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 15px;
  font-weight: 700;
}

.site-nav a:not(.download-link):hover,
.site-nav a[aria-current="page"] {
  color: var(--red);
}

.download-link,
.button-primary {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid #b52d45;
  border-radius: 6px;
  background: var(--red);
  box-shadow: 0 6px 16px rgba(201, 54, 79, 0.22);
  color: var(--white);
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.download-link:hover,
.button-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(201, 54, 79, 0.28);
}

.button-secondary {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid #cbd3dc;
  border-radius: 6px;
  background: var(--white);
  font-weight: 800;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid #cbd3dc;
  border-radius: 6px;
  background: var(--white);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.hero-grid {
  min-height: 620px;
  padding: 54px 0 52px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.86fr);
  align-items: center;
  gap: 68px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
}

.eyebrow::before {
  width: 26px;
  height: 3px;
  background: var(--red);
  content: "";
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.16;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 580px;
  margin-bottom: 22px;
  font-size: clamp(42px, 5vw, 68px);
}

.hero-copy > p {
  max-width: 580px;
  margin-bottom: 28px;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-facts {
  margin: 30px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
}

.hero-facts li {
  padding: 7px 11px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 13px;
  font-weight: 700;
}

.schedule-stage {
  position: relative;
  min-height: 500px;
  display: grid;
  grid-template-columns: 78px minmax(0, 239px) 1fr;
  align-items: center;
}

.time-rail {
  align-self: stretch;
  padding: 52px 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid #aeb8c4;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
}

.time-rail span {
  position: relative;
}

.time-rail span::after {
  position: absolute;
  top: 50%;
  right: -10px;
  width: 18px;
  height: 1px;
  background: #aeb8c4;
  content: "";
}

.hero-phone {
  position: relative;
  z-index: 2;
  width: 239px;
  margin-left: 22px;
  overflow: hidden;
  border: 2px solid #2d3748;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.hero-phone img {
  width: 239px;
  height: auto;
}

.schedule-tags {
  align-self: stretch;
  padding: 56px 0 56px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.schedule-tags span {
  padding: 10px 12px;
  border: 1px solid #cbd3dc;
  background: var(--white);
  font-size: 13px;
  font-weight: 900;
}

.schedule-tags span:nth-child(2) {
  background: var(--mint);
  transform: translateX(-10px);
}

.schedule-tags span:nth-child(3) {
  background: var(--red);
  color: var(--white);
}

.section {
  padding: 82px 0;
}

.section.white {
  background: var(--white);
}

.section-heading {
  margin-bottom: 34px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
}

.section-note {
  max-width: 520px;
  color: var(--ink-soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature-card {
  min-height: 230px;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.feature-card:nth-child(2) {
  background: #fff4f5;
}

.feature-card:nth-child(3) {
  background: #eafbf5;
}

.feature-number {
  display: block;
  margin-bottom: 36px;
  color: var(--red);
  font-weight: 900;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 21px;
}

.feature-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.screen-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  box-shadow: 0 12px 28px rgba(23, 32, 51, 0.08);
}

.screen-card:nth-child(2) {
  box-shadow: 0 12px 28px rgba(23, 32, 51, 0.08);
}

.screen-card img {
  width: min(100%, 239px);
  height: auto;
  margin: 0 auto 20px;
  border: 1px solid var(--line);
}

.screen-card h3 {
  margin-bottom: 8px;
}

.screen-card p {
  margin: 0;
  color: var(--ink-soft);
}

.guide-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  background: var(--line);
  gap: 1px;
}

.guide-panel {
  padding: 38px;
  background: var(--white);
}

.guide-panel strong {
  display: block;
  margin-bottom: 12px;
  color: var(--red);
}

.guide-panel h3 {
  font-size: 28px;
}

.guide-panel p {
  color: var(--ink-soft);
}

.faq-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.faq-preview article {
  padding: 24px;
  border-top: 4px solid var(--red);
  background: var(--white);
  box-shadow: 0 10px 24px rgba(16, 27, 58, 0.08);
}

.faq-preview p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.cta-band {
  padding: 54px 0;
  background: #edf6f3;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.cta-inner h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
}

.page-hero {
  padding: 76px 0 58px;
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.page-hero h1 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(38px, 5vw, 62px);
}

.page-hero p {
  max-width: 780px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.content-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  align-items: start;
  gap: 48px;
}

.side-index {
  position: sticky;
  top: 104px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--white);
}

.side-index strong {
  display: block;
  margin-bottom: 14px;
}

.side-index a {
  display: block;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.prose-section {
  margin-bottom: 52px;
}

.prose-section h2 {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 32px;
}

.prose-section h3 {
  margin-top: 28px;
  font-size: 22px;
}

.prose-section p,
.prose-section li {
  color: #2f3d5c;
}

.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.step-list li {
  position: relative;
  min-height: 86px;
  padding: 18px 20px 18px 80px;
  border-bottom: 1px solid var(--line);
  counter-increment: steps;
}

.step-list li::before {
  position: absolute;
  top: 16px;
  left: 10px;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid #b7d8cf;
  background: var(--mint);
  content: counter(steps, decimal-leading-zero);
  font-weight: 900;
}

.callout {
  padding: 24px;
  border-left: 4px solid var(--red);
  background: #fff4f5;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.faq-question {
  width: 100%;
  padding: 22px 56px 22px 20px;
  position: relative;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  text-align: left;
}

.faq-question::after {
  position: absolute;
  top: 50%;
  right: 20px;
  content: "+";
  color: var(--red);
  font-size: 28px;
  transform: translateY(-50%);
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  padding: 0 20px 22px;
  color: var(--ink-soft);
}

.faq-answer[hidden] {
  display: none;
}

.site-footer {
  padding: 42px 0;
  background: var(--ink);
  color: #dbe4f3;
  text-align: center;
}

.footer-links {
  margin-bottom: 18px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.site-footer p {
  max-width: 920px;
  margin: 10px auto 0;
  font-size: 13px;
}

@media (max-width: 960px) {
  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr 390px;
    gap: 32px;
  }

  .schedule-stage {
    transform: scale(0.88);
    transform-origin: center;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .side-index {
    position: static;
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 28px, 1160px);
  }

  .header-inner {
    min-height: 64px;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: 64px 0 auto;
    padding: 24px 20px 28px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border-bottom: 2px solid var(--ink);
    background: var(--paper);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    text-align: center;
  }

  .hero-grid {
    min-height: auto;
    padding: 18px 0 14px;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-copy > p {
    font-size: 16px;
  }

  .schedule-stage {
    min-height: 250px;
    grid-template-columns: 44px minmax(0, 150px) 1fr;
    transform: none;
  }

  .time-rail {
    padding: 24px 0;
  }

  .hero-phone {
    width: 150px;
    margin-left: 12px;
    border-width: 6px;
  }

  .schedule-tags {
    padding: 32px 0 32px 12px;
  }

  .schedule-tags span {
    padding: 8px 6px;
    font-size: 11px;
  }

  .section {
    padding: 58px 0;
  }

  .section-heading,
  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .feature-grid,
  .gallery-grid,
  .guide-strip,
  .faq-preview {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
  }

  .page-hero {
    padding: 52px 0 40px;
  }

  .page-hero h1 {
    font-size: 40px;
  }
}

@media (max-width: 390px) {
  .hero h1,
  .page-hero h1 {
    font-size: 36px;
  }

  .schedule-stage {
    grid-template-columns: 42px minmax(0, 150px) 1fr;
  }

  .hero-phone {
    width: 150px;
  }
}