/* ============================================================
   元境官网主样式：结构参考 codebuddy.cn/work
   固定毛玻璃导航 / Hero / 亮点大字标 / 三张场景大卡 /
   评价 / FAQ / 下载区 / 浅色反差 CTA / 纯黑大水印页脚
   ============================================================ */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

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

section {
  padding: 96px 24px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  text-align: center;
  margin: 0 0 12px;
}

.section-sub {
  color: var(--text-secondary);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
  font-size: 16px;
}

/* ---------- 进场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.btn--primary {
  background: var(--primary);
  color: var(--on-primary);
}

.btn--primary:hover {
  background: var(--primary-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn--ghost:hover {
  background: var(--primary-soft);
}

.btn--sm {
  padding: 9px 18px;
  font-size: 14px;
}

.btn--disabled {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-subtle);
  cursor: default;
}

.btn-arrow {
  transition: transform 0.2s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(5px);
}

/* ---------- 导航 ---------- */
.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
}

.brand-logo {
  width: 32px;
  height: 32px;
}

.brand-caret {
  margin-left: 6px;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--text-secondary);
  vertical-align: middle;
}

.nav-links {
  display: flex;
  gap: 26px;
  margin-left: auto;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  gap: 10px;
}

.pill {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  border: 1.5px solid transparent;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.pill--ghost {
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.pill--ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pill--solid {
  background: var(--primary);
  color: var(--on-primary);
}

.pill--solid:hover {
  background: var(--primary-hover);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: transform 0.2s, opacity 0.2s;
}

/* ---------- Hero ---------- */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 170px;
  text-align: center;
}

.eyebrow {
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.24em;
  margin: 0 0 18px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.12;
  font-weight: 700;
  margin: 0 0 22px;
}

.hero-sub {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 620px;
  margin: 0 auto 28px;
}

.hero-points {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding: 0;
  margin: 0 0 36px;
  font-size: 14px;
  color: var(--text-secondary);
}

.hero-points b {
  color: var(--primary);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

/* 手机 mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-glow {
  position: absolute;
  inset: 10% 20%;
  background: radial-gradient(ellipse at center, var(--primary-soft), transparent 70%);
  filter: blur(30px);
  z-index: 0;
}

.phone-mockup {
  position: relative;
  z-index: 1;
  width: 300px;
  border: 3px solid var(--border-strong);
  border-radius: 36px;
  background: var(--bg-elevated);
  padding: 40px 18px 26px;
}

.phone-notch {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 8px;
  border-radius: 4px;
  background: var(--border-subtle);
}

.phone-screen {
  color: var(--primary);
  text-align: left;
}

.mock-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.mock-floorplan {
  width: 100%;
  height: auto;
  margin-bottom: 14px;
}

.mock-compass {
  opacity: 0.9;
}

.mock-badge {
  font-size: 12px;
  background: var(--primary-soft);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 4px 12px;
  display: inline-block;
  margin-bottom: 14px;
}

.mock-badge b {
  color: var(--primary-hover);
}

.mock-bar {
  height: 22px;
  border-radius: 6px;
  background:
    linear-gradient(90deg, var(--primary) calc(var(--w)), transparent 0);
  opacity: 0.85;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.mock-bar span {
  font-size: 11px;
  padding-left: 8px;
  color: var(--on-primary);
  font-weight: 600;
}

/* ---------- 亮点区 ---------- */
.highlights {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.wordmark {
  font-family: var(--font-heading);
  font-size: clamp(20px, 3vw, 30px);
  letter-spacing: 0.5em;
  color: var(--text-secondary);
  opacity: 0.55;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  display: inline-block;
  padding: 12px 28px 12px 38px;
  margin-bottom: 36px;
}

.big-line {
  font-family: var(--font-heading);
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 20px;
}

.big-line::selection,
.hero-title::selection {
  background: var(--primary);
  color: var(--on-primary);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 56px;
}

.cap-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 28px 24px;
  text-align: left;
  transition: background-color 0.25s, border-color 0.25s;
}

.cap-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.cap-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin: 0 0 10px;
  color: var(--primary);
}

.cap-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 场景大卡 ---------- */
.scenarios {
  max-width: 1080px;
  margin: 0 auto;
}

.scenario-card {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  overflow: hidden;
  margin-bottom: 28px;
  transition: border-color 0.25s;
}

.scenario-card:hover {
  border-color: var(--border-strong);
}

.scenario-card:nth-child(even) .scenario-media {
  order: 2;
}

.scenario-media {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  background: var(--bg-elevated);
  color: var(--primary);
  padding: 32px;
}

.scenario-svg {
  width: min(100%, 380px);
  height: auto;
}

/* 迷你手机占位 */
.mini-phone {
  width: 180px;
  border: 2.5px solid var(--border-strong);
  border-radius: 24px;
  background: var(--bg);
  padding: 26px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mini-phone-line {
  height: 8px;
  border-radius: 4px;
  background: var(--primary);
  opacity: 0.7;
}

.mini-phone-block {
  height: 44px;
  border-radius: 8px;
  background: var(--primary-soft);
  border: 1px solid var(--border-subtle);
}

.mini-phone-block--short {
  height: 30px;
}

.mini-phone-score {
  font-size: 12px;
  color: var(--text-secondary);
}

.mini-phone-score b {
  color: var(--primary);
  font-size: 16px;
}

.scenario-body {
  padding: 44px 40px;
}

.scenario-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 16px;
}

.scenario-body h3 {
  font-family: var(--font-heading);
  font-size: 24px;
  margin: 0 0 18px;
}

.scenario-line {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 10px;
}

.scenario-line b {
  color: var(--text-primary);
  font-weight: 600;
}

.scenario-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
}

.scenario-link:hover {
  color: var(--primary-hover);
}

/* ---------- 用户评价 ---------- */
.voices {
  max-width: 1080px;
  margin: 0 auto;
}

.voice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.voice-card {
  margin: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: border-color 0.25s;
}

.voice-card:hover {
  border-color: var(--border-strong);
}

.voice-card blockquote {
  margin: 0;
  font-size: 14px;
  color: var(--text-primary);
  flex: 1;
}

.voice-card figcaption {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.voice-card figcaption b {
  color: var(--primary);
  font-family: var(--font-accent);
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 760px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 18px 22px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::after {
  content: "+";
  color: var(--primary);
  font-size: 20px;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 下载区 ---------- */
.download {
  background: var(--bg-elevated);
}

.platform-grid {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.platform-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary);
  flex-shrink: 0;
  clip-path: polygon(30% 0, 100% 50%, 30% 100%, 30% 72%, 0 72%, 0 28%, 30% 28%);
}

.platform-icon--ios {
  clip-path: none;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, var(--primary-hover), var(--primary));
}

.platform-icon--web {
  clip-path: none;
  background: var(--primary-soft);
  border: 2px solid var(--primary);
  border-radius: 10px;
}

.platform-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.platform-name {
  font-weight: 600;
  font-size: 15px;
}

.platform-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ---------- 浅色反差 CTA ---------- */
.cta {
  background: var(--cta-bg);
  padding: 110px 24px;
}

.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  color: var(--cta-text);
}

.cta h2 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4.5vw, 44px);
  margin: 0 0 14px;
}

.cta p {
  color: var(--cta-sub);
  margin: 0 0 32px;
}

.btn--cta {
  background: var(--cta-text);
  color: var(--cta-bg);
}

.btn--cta:hover {
  opacity: 0.88;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #050505;
  color: #d8d8d4;
  padding: 72px 24px 0;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-bottom: 48px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h4 {
  margin: 0 0 6px;
  font-size: 14px;
  color: #ffffff;
}

.footer-col a {
  font-size: 13px;
  color: #9a9a94;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #ffffff;
}

[hidden] {
  display: none !important;
}

.footer-legal {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  gap: 24px;
  justify-content: center;
  font-size: 12px;
  color: #77776f;
}

.footer-watermark {
  font-family: var(--font-heading);
  font-size: clamp(56px, 12vw, 140px);
  text-align: center;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1.05;
  padding: 16px 0 24px;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .scenario-card {
    grid-template-columns: 1fr;
  }

  .scenario-card:nth-child(even) .scenario-media {
    order: 0;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-links,
  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(24px);
    padding: 20px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border-subtle);
  }

  .site-nav.nav-open .nav-actions {
    display: none;
  }

  .hero {
    padding-top: 130px;
  }

  section {
    padding: 64px 20px;
  }

  .capability-grid,
  .voice-grid {
    grid-template-columns: 1fr;
  }

  .scenario-body {
    padding: 30px 24px;
  }

  .platform-card {
    flex-wrap: wrap;
  }
}