/* 枕书官方宣传网站 · 共享样式 */

:root {
  /* 品牌色 — 取自 Logo 蓝青渐变 & App 界面 */
  --brand-blue: #3B7FFF;
  --brand-blue-dark: #2563EB;
  --brand-cyan: #5DD4D4;
  --brand-gradient: linear-gradient(135deg, #2563EB 0%, #5DD4D4 100%);

  --bg-primary: #FFFFFF;
  --bg-secondary: #F3F6FA;
  --bg-warm: #F7F9FC;
  --bg-deep: #0B1220;
  --text-primary: #152033;
  --text-secondary: #5B6578;
  --text-on-dark: rgba(255, 255, 255, 0.78);
  --accent: #3B7FFF;
  --accent-hover: #2563EB;
  --accent-soft: rgba(59, 127, 255, 0.10);
  --accent-glow: rgba(59, 127, 255, 0.22);

  /* 屿间 Pastel 点缀色 */
  --pastel-blue: #8EBBFF;
  --pastel-peach: #FFBD8E;
  --pastel-mint: #98D8C1;
  --pastel-lavender: #C4B5FD;

  --divider: rgba(21, 32, 51, 0.07);
  --shadow: rgba(37, 99, 235, 0.10);
  --shadow-deep: rgba(15, 28, 52, 0.16);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.65);
  --radius: 20px;
  --font: "Noto Sans SC", -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --font-display: "Noto Serif SC", "Songti SC", "Noto Serif CJK SC", serif;
  --max-width: 1120px;
  --header-height: 68px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(59, 127, 255, 0.08), transparent 55%),
    radial-gradient(900px 500px at -5% 20%, rgba(93, 212, 212, 0.07), transparent 50%),
    var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-hover);
}

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

::selection {
  background: rgba(59, 127, 255, 0.18);
  color: var(--text-primary);
}

/* ── Reveal motion ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.22s;
}

.reveal-delay-3 {
  transition-delay: 0.32s;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-delay,
  .reveal-delay-2,
  .reveal-delay-3 {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .phone-float,
  .hero-orb,
  .bottle-dot {
    animation: none !important;
  }
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
}

.site-header.is-scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(1.35);
  -webkit-backdrop-filter: blur(18px) saturate(1.35);
  border-bottom-color: var(--divider);
  box-shadow: 0 8px 30px rgba(15, 28, 52, 0.05);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.08em;
}

.logo img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 10px rgba(59, 127, 255, 0.25));
}

.logo:hover {
  color: var(--accent);
}

.hero-logo {
  width: 76px;
  height: 76px;
  object-fit: contain;
  margin-bottom: 22px;
  filter: drop-shadow(0 10px 24px rgba(59, 127, 255, 0.28));
}

.nav-desktop {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-desktop a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}

.nav-desktop a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

.nav-mobile {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--divider);
  padding: 16px 24px 24px;
  z-index: 99;
}

.nav-mobile.open {
  display: block;
}

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-mobile a {
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
}

.nav-mobile a:hover {
  background: var(--accent-soft);
}

/* ── Main layout ── */
main {
  padding-top: var(--header-height);
}

.section {
  padding: 100px 24px;
  position: relative;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(243, 246, 250, 0.55), rgba(243, 246, 250, 0.95));
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 56px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
  letter-spacing: 0.08em;
  border: 1px solid rgba(59, 127, 255, 0.12);
}

/* ── Hero ── */
.hero {
  padding: 88px 24px 96px;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(ellipse 50% 40% at 70% 20%, rgba(59, 127, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 40% 35% at 15% 70%, rgba(93, 212, 212, 0.14), transparent 55%),
    radial-gradient(ellipse 30% 25% at 55% 75%, rgba(196, 181, 253, 0.10), transparent 50%);
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.4;
  animation: orbDrift 14s ease-in-out infinite alternate;
}

.hero-orb-1 {
  width: 520px;
  height: 520px;
  background: var(--brand-blue);
  top: -140px;
  right: -100px;
}

.hero-orb-2 {
  width: 380px;
  height: 380px;
  background: var(--brand-cyan);
  bottom: -80px;
  left: -80px;
  opacity: 0.28;
  animation-delay: -4s;
}

.hero-orb-3 {
  width: 220px;
  height: 220px;
  background: var(--pastel-lavender);
  top: 42%;
  left: 28%;
  opacity: 0.18;
  animation-delay: -7s;
}

@keyframes orbDrift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(24px, -18px, 0) scale(1.06); }
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 72px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
  line-height: 1.15;
  color: var(--text-primary);
}

.hero-slogan {
  font-size: 22px;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 40px;
  max-width: 480px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s ease, filter 0.3s ease;
  font-family: var(--font);
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow:
    0 10px 28px var(--accent-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255, 255, 255, 0.35) 45%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.6s var(--ease-out);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 36px var(--accent-glow);
}

.btn-primary:hover::after {
  transform: translateX(120%);
}

.btn-disabled {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text-secondary);
  border: 1px solid var(--divider);
  cursor: not-allowed;
  box-shadow: none;
}

.btn-disabled:hover {
  transform: none;
  box-shadow: none;
}

.btn-note {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 12px;
  text-align: center;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.phone-frame,
.phone-frame-sm {
  position: relative;
  overflow: hidden;
  background: #0f172a;
}

.phone-frame {
  width: 286px;
  border-radius: 36px;
  border: 3px solid rgba(255, 255, 255, 0.92);
  box-shadow:
    0 30px 70px rgba(15, 28, 52, 0.22),
    0 8px 24px rgba(59, 127, 255, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
  transition: transform 0.5s var(--ease-out);
}

.phone-frame:hover {
  transform: perspective(1000px) rotateY(-1deg) rotateX(0deg) translateY(-6px);
}

.phone-float {
  animation: phoneFloat 5.5s ease-in-out infinite;
}

@keyframes phoneFloat {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -10px; }
}

.phone-frame-glow {
  position: absolute;
  width: 280px;
  height: 280px;
  background: var(--brand-gradient);
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.32;
  z-index: -1;
  animation: orbDrift 10s ease-in-out infinite alternate;
}

.phone-notch {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 18px;
  background: #0b1220;
  border-radius: 999px;
  z-index: 2;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.phone-notch-sm {
  width: 72px;
  height: 14px;
  top: 8px;
}

.phone-screenshot {
  width: 100%;
  height: auto;
  display: block;
}

/* ── AI modes strip ── */
.modes-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 64px;
}

.mode-pill {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(59, 127, 255, 0.12);
  padding: 9px 18px;
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(15, 28, 52, 0.04);
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.mode-pill:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 127, 255, 0.28);
  box-shadow: 0 10px 24px rgba(59, 127, 255, 0.10);
}

/* ── Feature showcase ── */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 96px;
}

.showcase:last-child {
  margin-bottom: 0;
}

.showcase-reverse .showcase-visual {
  order: -1;
}

.showcase-text h3 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.showcase-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 22px;
}

.showcase-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.showcase-visual::before {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 127, 255, 0.16), transparent 70%);
  filter: blur(10px);
  z-index: 0;
}

.phone-frame-sm {
  width: 244px;
  border-radius: 30px;
  border: 3px solid rgba(255, 255, 255, 0.92);
  box-shadow:
    0 22px 50px rgba(15, 28, 52, 0.16),
    0 6px 18px rgba(59, 127, 255, 0.08);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s ease;
  z-index: 1;
}

.phone-frame-sm:hover {
  transform: translateY(-8px);
  box-shadow:
    0 28px 60px rgba(15, 28, 52, 0.18),
    0 10px 24px rgba(59, 127, 255, 0.12);
}

.phone-frame-sm .phone-screenshot {
  width: 100%;
}

/* ── 屿间 special section ── */
.section-bottle {
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(59, 127, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 45% 40% at 20% 70%, rgba(152, 216, 193, 0.10), transparent 50%),
    linear-gradient(160deg, #0B1220 0%, #121B2E 55%, #0E1626 100%);
  overflow: hidden;
  color: #fff;
}

.section-bottle .showcase-text h3 {
  color: #fff;
}

.section-bottle .showcase-text p {
  color: var(--text-on-dark);
}

.section-bottle .section-label {
  color: #B8D4FF;
  background: rgba(142, 187, 255, 0.12);
  border-color: rgba(142, 187, 255, 0.2);
}

.section-bottle .tag {
  color: #C9DCFF;
  background: rgba(142, 187, 255, 0.12);
}

.bottle-bg-dots {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.bottle-dot {
  position: absolute;
  border-radius: 50%;
  opacity: 0.7;
  filter: blur(0.2px);
  box-shadow: 0 0 18px currentColor;
  animation: starPulse 4.5s ease-in-out infinite;
}

.bottle-dot-1 { width: 12px; height: 12px; background: var(--pastel-blue); color: var(--pastel-blue); top: 15%; left: 8%; }
.bottle-dot-2 { width: 8px; height: 8px; background: var(--pastel-peach); color: var(--pastel-peach); top: 25%; right: 12%; animation-delay: 0.6s; }
.bottle-dot-3 { width: 16px; height: 16px; background: var(--pastel-mint); color: var(--pastel-mint); bottom: 30%; left: 15%; animation-delay: 1.2s; }
.bottle-dot-4 { width: 10px; height: 10px; background: var(--pastel-lavender); color: var(--pastel-lavender); top: 60%; right: 8%; animation-delay: 1.8s; }
.bottle-dot-5 { width: 6px; height: 6px; background: var(--pastel-peach); color: var(--pastel-peach); bottom: 20%; right: 25%; animation-delay: 0.9s; }
.bottle-dot-6 { width: 14px; height: 14px; background: var(--pastel-blue); color: var(--pastel-blue); top: 10%; right: 30%; animation-delay: 1.5s; }

@keyframes starPulse {
  0%, 100% { opacity: 0.45; transform: scale(1); }
  50% { opacity: 0.95; transform: scale(1.25); }
}

.showcase-bottle .phone-frame-sm,
.phone-frame-dark {
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.45),
    0 0 40px rgba(142, 187, 255, 0.18);
}

.showcase-bottle .showcase-visual::before {
  background: radial-gradient(circle, rgba(142, 187, 255, 0.28), transparent 70%);
}

/* ── Compact feature cards ── */
.features-compact {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 16px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.82);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: 0 10px 30px rgba(15, 28, 52, 0.05);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s ease, border-color 0.35s ease;
  border: 1px solid rgba(59, 127, 255, 0.08);
  backdrop-filter: blur(8px);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(59, 127, 255, 0.12);
  border-color: rgba(59, 127, 255, 0.18);
}

.feature-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  color: var(--accent);
  padding: 8px;
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(59, 127, 255, 0.12), rgba(93, 212, 212, 0.10));
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tag {
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 5px 11px;
  border-radius: 999px;
  font-weight: 500;
}

/* ── Advantages ── */
.advantages-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

.advantage-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 26px 24px;
  background: rgba(255, 255, 255, 0.78);
  border-radius: var(--radius);
  border: 1px solid rgba(59, 127, 255, 0.08);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s ease;
  backdrop-filter: blur(8px);
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(59, 127, 255, 0.10);
}

.advantage-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--brand-gradient);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 18px rgba(59, 127, 255, 0.28);
}

.advantage-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.advantage-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ── Membership ── */
.membership-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: 0 4px 24px var(--shadow);
  border: 1px solid var(--divider);
  position: relative;
  overflow: hidden;
}

.membership-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
}

.membership-benefits {
  list-style: none;
  margin: 28px 0;
}

.membership-benefits li {
  padding: 10px 0;
  padding-left: 28px;
  position: relative;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--divider);
}

.membership-benefits li:last-child {
  border-bottom: none;
}

.membership-benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

.pricing {
  display: flex;
  gap: 20px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.price-item {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 20px 16px;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--divider);
}

.price-item .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.price-item .amount {
  font-size: 24px;
  font-weight: 600;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.price-item .note {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.price-badge {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.free-note {
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  padding-top: 16px;
  border-top: 1px solid var(--divider);
}

/* ── Download ── */
.download-section {
  text-align: center;
  background:
    radial-gradient(ellipse 50% 60% at 50% 0%, rgba(59, 127, 255, 0.08), transparent 60%),
    var(--bg-warm);
}

.download-panel {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 36px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(59, 127, 255, 0.10);
  box-shadow: 0 20px 50px rgba(15, 28, 52, 0.06);
  backdrop-filter: blur(12px);
}

.download-section .section-subtitle {
  margin-bottom: 28px;
}

/* ── About ── */
.about-text {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.about-text p + p {
  margin-top: 12px;
}

.contact-wechat {
  max-width: 560px;
  margin: 36px auto 0;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 28px 30px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(59, 127, 255, 0.10);
  box-shadow: 0 16px 40px rgba(15, 28, 52, 0.06);
  backdrop-filter: blur(10px);
  text-align: left;
}

.wechat-qr {
  width: 168px;
  height: auto;
  object-fit: contain;
  border-radius: 16px;
  flex-shrink: 0;
  box-shadow: 0 8px 20px rgba(15, 28, 52, 0.08);
  background: #fff;
}

.contact-wechat-text h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.contact-wechat-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.wechat-id {
  margin-top: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* ── Footer ── */
.site-footer {
  background: linear-gradient(180deg, #F3F6FA 0%, #EAF0F7 100%);
  border-top: 1px solid var(--divider);
  padding: 56px 24px 36px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-company {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.footer-info {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 12px;
  color: var(--text-secondary);
}

.footer-icp {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ── Legal pages ── */
.legal-page {
  padding: 40px 24px 80px;
}

.legal-container {
  max-width: 760px;
  margin: 0 auto;
}

.legal-page h1 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.legal-meta {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--divider);
}

.legal-page h2 {
  font-size: 18px;
  font-weight: 600;
  margin: 36px 0 16px;
  color: var(--text-primary);
}

.legal-page h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 24px 0 12px;
}

.legal-page p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.8;
}

.legal-page ol,
.legal-page ul {
  margin: 12px 0 12px 24px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.legal-page li {
  margin-bottom: 8px;
}

.legal-notice {
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 24px 0 32px;
  border-radius: 0 12px 12px 0;
}

.legal-notice p {
  margin-bottom: 12px;
}

.legal-notice p:last-child {
  margin-bottom: 0;
}

.legal-page strong {
  color: var(--text-primary);
  font-weight: 600;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.legal-back:hover {
  color: var(--accent);
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .showcase {
    gap: 40px;
  }

  .features-compact {
    grid-template-columns: 1fr;
  }
}

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

  .menu-toggle {
    display: block;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero-logo {
    width: 60px;
    height: 60px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-content h1 {
    font-size: 44px;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-visual {
    order: -1;
  }

  .phone-frame {
    width: 224px;
    transform: none;
  }

  .phone-frame:hover {
    transform: translateY(-4px);
  }

  .showcase {
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 72px;
    text-align: center;
  }

  .showcase-reverse .showcase-visual {
    order: -1;
  }

  .showcase-text .section-label {
    display: inline-block;
  }

  .phone-frame-sm {
    width: 204px;
  }

  .advantages-list {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 20px;
  }

  .hero {
    padding: 56px 20px 72px;
    min-height: auto;
  }

  .membership-card,
  .download-panel {
    padding: 28px 22px;
  }

  .contact-wechat {
    flex-direction: column;
    text-align: center;
    gap: 18px;
    padding: 24px 20px;
  }

  .wechat-qr {
    width: 180px;
    height: auto;
  }

  .pricing {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 36px;
  }

  .section-title {
    font-size: 26px;
  }

  .showcase-text h3 {
    font-size: 22px;
  }
}