:root {
  color-scheme: light;
  --bg: #f3fff8;
  --surface: #ffffff;
  --ink: #0b1f2a;
  --muted: #5d7280;
  --soft: #e8fff2;
  --line: rgba(8, 91, 76, 0.12);
  --green: #15c987;
  --green-deep: #075e4a;
  --green-glow: rgba(21, 201, 135, 0.22);
  --blue: #0ea5e9;
  --blue-soft: rgba(14, 165, 233, 0.14);
  --amber: #ff7a1a;
  --sun: #fbbf24;
  --coral: #ff5f57;
  --lime: #a3e635;
  --dark: #062821;
  --dark-elevated: #0a3a32;
  --shadow: 0 18px 54px -26px rgba(7, 94, 74, 0.32);
  --shadow-hover: 0 30px 70px -24px rgba(14, 165, 233, 0.26);
  --radius-lg: 8px;
  --radius-xl: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, #f0fff7 0%, #f7fdff 45%, #fffaf0 100%);
  color: var(--ink);
  font-family: "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Outfit", sans-serif;
  font-weight: 800;
  letter-spacing: 0;
  color: var(--green-deep);
}

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

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

::selection {
  background: rgba(21, 201, 135, 0.26);
  color: var(--green-deep);
}

svg {
  display: block;
}

p,
h1,
h2,
h3,
strong,
span,
a {
  overflow-wrap: anywhere;
}

.lucide-icon,
.nav-icon,
.download-icon,
.feature-lucide-icon,
.card-lucide-icon,
.button-lucide-icon,
.item-lucide-icon,
.metric-inline-icon,
.slot-icon,
.chip-icon,
.carousel-icon {
  flex: 0 0 auto;
}

.skip-link {
  position: absolute;
  left: 24px;
  top: -80px;
  z-index: 30;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  transition: top 160ms ease;
}

.skip-link:focus {
  top: 16px;
}

.section-shell,
.nav-shell,
.footer-shell,
.hero-shell,
.article-hero,
.article-layout,
.article-breadcrumb-shell {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(248, 255, 251, 0.78);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  border-color: var(--line);
  box-shadow: 0 12px 36px -24px rgba(7, 94, 74, 0.28);
}

.nav-shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-family: "Outfit", sans-serif;
  font-weight: 900;
  color: var(--green-deep);
}

.brand-link img,
.footer-brand img {
  border-radius: 12px;
  box-shadow: 0 10px 24px var(--green-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav-links a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--green-deep);
}

.language-switch {
  min-width: 52px;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink) !important;
  font-weight: 700;
}

.nav-download-link {
  background: linear-gradient(135deg, var(--green) 0%, var(--blue) 100%);
  color: #ffffff !important;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(14, 165, 233, 0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav-download-link .apple-icon,
.premium-download-btn .apple-icon {
  flex-shrink: 0;
  display: block;
  filter: brightness(0) invert(1);
}

.nav-download-link .apple-icon {
  width: 17px;
  height: 17px;
}

.premium-download-btn .apple-icon {
  width: 22px;
  height: 22px;
}

.download-cta-copy .premium-download-btn {
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

.nav-download-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(14, 165, 233, 0.3);
}

/* 通用区块 */
.section-block {
  padding: 112px 0;
}

.section-dark {
  background:
    linear-gradient(145deg, #062821 0%, #0b4d41 48%, #075985 100%);
  color: #ecfdf5;
}

.section-dark h2,
.section-dark h3 {
  color: #ffffff;
}

.section-dark p,
.section-dark .section-heading p {
  color: rgba(236, 253, 245, 0.72);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(21, 201, 135, 0.1);
  color: var(--green-deep);
  font-family: "Outfit", sans-serif;
  font-size: 13px;
  font-weight: 700;
}

.eyebrow-light {
  background: rgba(255, 255, 255, 0.13);
  color: #b7f7d5;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
}

.section-heading p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.split-heading {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.text-link {
  color: #4ade80;
  font-size: 15px;
  font-weight: 800;
  border-bottom: 2px solid rgba(16, 185, 129, 0.35);
  padding-bottom: 4px;
}

/* Hero */
.hero-section {
  position: relative;
  padding: 56px 0 88px;
  background: var(--bg);
}

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

.hero-aurora {
  position: absolute;
  inset: -18% -12% auto -12%;
  height: 58%;
  background:
    linear-gradient(100deg, rgba(21, 201, 135, 0.18), transparent 34%),
    linear-gradient(140deg, transparent 34%, rgba(14, 165, 233, 0.16) 56%, rgba(251, 191, 36, 0.12) 84%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.76), rgba(247, 251, 248, 0));
  transform: skewY(-3deg);
  animation: auroraShift 12s ease-in-out infinite alternate;
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, #000 30%, transparent 80%);
  animation: gridDrift 18s linear infinite;
}

.hero-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 56px;
  align-items: center;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 4.4rem);
  line-height: 1.08;
  max-width: 12ch;
  color: var(--green-deep);
}

.hero-lede {
  margin: 22px 0 0;
  max-width: 560px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  color: var(--green-deep);
  font-size: 15px;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.button-secondary:hover {
  transform: translateY(-1px);
  border-color: rgba(14, 165, 233, 0.34);
  box-shadow: var(--shadow);
}

.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--green), var(--blue));
  color: #ffffff;
  font-weight: 800;
  box-shadow: 0 10px 24px var(--green-glow);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.hero-metrics li {
  position: relative;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
  min-width: 0;
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.hero-metrics li::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--green), var(--blue));
}

.hero-metrics li:nth-child(2)::before {
  background: linear-gradient(90deg, var(--blue), var(--sun));
}

.hero-metrics li:nth-child(3)::before {
  background: linear-gradient(90deg, var(--green), var(--lime));
}

.hero-metrics li:hover {
  transform: translateY(-4px);
  border-color: rgba(14, 165, 233, 0.24);
  box-shadow: 0 24px 56px -30px rgba(14, 165, 233, 0.34);
}

.metric-inline-icon {
  margin-bottom: 10px;
  color: var(--green);
}

.hero-metrics strong {
  display: block;
  font-size: 14px;
  color: var(--green-deep);
}

.hero-metrics span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.product-visual {
  position: relative;
  min-height: 540px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-shot-frame {
  width: min(520px, 100%);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: var(--shadow);
  background: #ffffff;
}

.hero-shot-frame:hover {
  box-shadow: var(--shadow-hover);
}

.hero-poster {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.hero-device {
  position: relative;
  width: min(330px, 100%);
  aspect-ratio: 0.48;
  padding: 22px;
  border-radius: 34px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.78)),
    linear-gradient(135deg, rgba(16, 185, 129, 0.16), rgba(14, 165, 233, 0.12));
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 44px 90px -34px rgba(15, 23, 42, 0.48);
  display: grid;
  grid-template-rows: 20px 1fr auto auto;
  gap: 16px;
  overflow: hidden;
  animation: deviceFloat 7s ease-in-out infinite;
}

.device-speaker {
  width: 70px;
  height: 6px;
  justify-self: center;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.16);
}

.media-slot {
  position: relative;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
  isolation: isolate;
  border: 1px dashed rgba(6, 78, 59, 0.26);
  background:
    linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(14, 165, 233, 0.08)),
    repeating-linear-gradient(135deg, rgba(15, 23, 42, 0.04) 0 1px, transparent 1px 12px);
  color: var(--green-deep);
}

.media-slot::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 0 42%, rgba(255, 255, 255, 0.34) 50%, transparent 58% 100%);
  transform: translateX(-120%);
  animation: slotSweep 5s ease-in-out infinite;
  z-index: -1;
}

.media-slot span {
  font-size: 13px;
  font-weight: 800;
}

.slot-icon {
  margin-bottom: 10px;
  color: var(--green);
}

.hero-image-slot {
  min-height: 280px;
  border-radius: 12px;
}

.device-fast-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px;
  border-radius: 8px;
  background: rgba(6, 78, 59, 0.92);
  color: #ecfdf5;
}

.device-fast-row span {
  display: block;
  font-size: 12px;
  color: rgba(236, 253, 245, 0.66);
}

.device-fast-row strong {
  display: block;
  margin-top: 4px;
  font-family: "Outfit", sans-serif;
  font-size: 34px;
  color: #ffffff;
}

.row-lucide-icon {
  margin-right: 6px;
  vertical-align: -3px;
}

.device-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.device-stats span {
  min-width: 0;
  padding: 13px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(15, 23, 42, 0.06);
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 900;
  text-align: center;
  box-shadow: 0 12px 26px -22px rgba(15, 23, 42, 0.38);
}

.device-ring {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--green) 0 68%, rgba(255, 255, 255, 0.14) 68% 100%);
  color: #ffffff;
  font-size: 13px;
  font-weight: 900;
}

.device-progress-list {
  display: grid;
  gap: 10px;
}

.device-progress-list span {
  height: 9px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.device-progress-list i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), var(--blue));
  animation: barPulse 4.2s ease-in-out infinite;
}

.coach-chip {
  position: absolute;
  right: 0;
  bottom: 36px;
  min-width: 260px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  box-shadow: 0 24px 56px -28px rgba(255, 122, 26, 0.32);
  transition: transform 0.25s ease;
  animation: chipFloat 5.5s ease-in-out infinite;
}

.coach-chip:hover {
  transform: translateY(-4px);
}

.coach-chip strong {
  display: block;
  font-size: 14px;
  color: var(--green-deep);
}

.coach-chip p {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.coach-chip-icon {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(21, 201, 135, 0.14), rgba(251, 191, 36, 0.18));
  color: var(--amber);
}

/* 功能卡片 */
.product-section {
  background:
    linear-gradient(180deg, #ffffff 0%, #f2fff7 55%, #f8fdff 100%);
}

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

.feature-card,
.use-case-item,
.trust-item,
.faq-item,
.metric-dashboard-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature-card::before,
.use-case-item::before,
.metric-dashboard-card::before,
.faq-item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--green), var(--blue), var(--sun));
}

.feature-card:hover,
.use-case-item:hover,
.trust-item:hover,
.faq-item:hover,
.metric-dashboard-card:hover {
  transform: translateY(-6px);
  border-color: rgba(14, 165, 233, 0.28);
  box-shadow: var(--shadow-hover);
}

.feature-card {
  min-height: 280px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(21, 201, 135, 0.14), rgba(163, 230, 53, 0.16));
  color: var(--green);
  font-family: "Outfit", sans-serif;
  font-size: 13px;
  font-weight: 900;
}

.feature-icon.accent {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.14), rgba(21, 201, 135, 0.12));
  color: #0284c7;
}

.feature-icon.warm {
  background: linear-gradient(135deg, rgba(255, 122, 26, 0.13), rgba(251, 191, 36, 0.18));
  color: var(--amber);
}

.feature-card h3 {
  margin: auto 0 12px;
  font-size: 24px;
  line-height: 1.2;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

/* SEO topic hub */
.seo-hub-section {
  background:
    linear-gradient(180deg, #f8fdff 0%, #ffffff 45%, #f3fff8 100%);
}

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

.seo-topic-card {
  position: relative;
  min-height: 270px;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.82)),
    linear-gradient(135deg, rgba(21, 201, 135, 0.13), rgba(14, 165, 233, 0.11));
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.seo-topic-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--green), var(--blue), var(--sun));
}

.seo-topic-card:hover {
  transform: translateY(-6px);
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: var(--shadow-hover);
}

.seo-topic-icon {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  border-radius: 8px;
  background: rgba(21, 201, 135, 0.12);
  color: var(--green);
}

.seo-topic-kicker,
.topic-section-kicker {
  display: block;
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.seo-topic-card h3 {
  margin: 0 0 12px;
  font-size: 24px;
}

.seo-topic-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

/* 截图轮播 */
.screenshots-section {
  overflow: hidden;
  background:
    linear-gradient(145deg, #062821 0%, #075e4a 48%, #0e7490 100%);
}

.screenshots-carousel-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 1080px;
  margin: 48px auto 0;
  padding: 0 60px;
}

.screenshots-container {
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 12%, #000 88%, transparent);
}

.screenshots-track {
  display: flex;
  gap: 28px;
  transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

.screenshot-card {
  flex: 0 0 300px;
  text-align: center;
  min-width: 0;
}

.screenshot-poster {
  overflow: hidden;
  aspect-ratio: 0.46;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 26px 58px rgba(0, 0, 0, 0.32);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    linear-gradient(135deg, rgba(21, 201, 135, 0.13), rgba(14, 165, 233, 0.1));
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.screenshot-poster img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.screenshot-poster.media-slot {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 10px;
  padding: 28px;
  color: #ecfeff;
}

.screenshot-poster.media-slot .slot-icon {
  margin-bottom: 0;
  color: #86efac;
}

.screenshot-poster.media-slot span {
  color: #ecfeff;
}

.screenshot-poster.media-slot small {
  max-width: 100%;
  color: rgba(236, 253, 245, 0.68);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.45;
}

.screenshot-card:hover .screenshot-poster {
  transform: translateY(-8px) scale(1.015);
  box-shadow: 0 36px 72px rgba(21, 201, 135, 0.22);
}

.screenshot-info {
  margin-top: 22px;
}

.screenshot-info h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: #ffffff;
}

.screenshot-info p {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(236, 253, 245, 0.68);
}

.carousel-btn {
  position: absolute;
  top: 42%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.carousel-btn:hover {
  background: linear-gradient(135deg, var(--green), var(--sun));
  border-color: transparent;
  color: #03241d;
}

.prev-btn { left: 0; }
.next-btn { right: 0; }

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 36px;
}

.carousel-dots .dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: width 0.25s ease, background-color 0.25s ease;
}

.carousel-dots .dot.active {
  width: 24px;
  background: linear-gradient(90deg, var(--green), var(--sun));
}

/* 指标看板 */
.metrics-showcase-section {
  background:
    linear-gradient(180deg, #ffffff 0%, #f2fbff 52%, #fff9ed 100%);
}

.metrics-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.metric-dashboard-card {
  min-height: 320px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.92);
}

.metric-dashboard-card:nth-child(2)::before {
  background: linear-gradient(90deg, var(--blue), #67e8f9);
}

.metric-dashboard-card:nth-child(3)::before {
  background: linear-gradient(90deg, var(--amber), var(--sun));
}

.metric-dashboard-card:nth-child(4)::before {
  background: linear-gradient(90deg, var(--sun), var(--lime));
}

.metric-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.metric-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.metric-icon-box.bg-green { background: rgba(21, 201, 135, 0.14); color: var(--green); }
.metric-icon-box.bg-blue { background: rgba(14, 165, 233, 0.14); color: #0284c7; }
.metric-icon-box.bg-orange { background: rgba(255, 122, 26, 0.14); color: var(--amber); }
.metric-icon-box.bg-gold { background: rgba(251, 191, 36, 0.18); color: #b45309; }

.metric-card-header h3 {
  margin: 0;
  font-size: 17px;
}

.metric-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.progress-ring-container {
  position: relative;
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
}

.progress-ring-bar {
  animation: ringDash 1.5s ease-out both;
}

.progress-ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.progress-ring-text .value {
  font-size: 20px;
  font-weight: 900;
  color: var(--green-deep);
}

.progress-ring-text .label {
  font-size: 11px;
  color: var(--muted);
}

.macros-indicator {
  display: grid;
  gap: 8px;
}

.macro-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
}

.macro-label {
  width: 48px;
  color: var(--muted);
}

.bar-bg {
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: #eef2f7;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  transform-origin: left center;
  animation: fillGrow 1.1s ease-out both;
}

.bar-fill.carbs { background: linear-gradient(90deg, var(--amber), var(--sun)); }
.bar-fill.protein { background: linear-gradient(90deg, var(--green), var(--lime)); }
.bar-fill.fat { background: linear-gradient(90deg, var(--sun), #f97316); }

.macro-val {
  width: 36px;
  text-align: right;
}

.hydration-cup-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.water-glass {
  position: relative;
  width: 88px;
  height: 118px;
  border: 3px solid rgba(15, 23, 42, 0.12);
  border-top: none;
  border-radius: 0 0 16px 16px;
  overflow: hidden;
  background: #f8fafc;
}

.water-level {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, #67e8f9 0%, var(--blue) 100%);
  transition: height 0.45s ease;
}

.glass-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

.glass-text .value {
  font-size: 18px;
  font-weight: 900;
}

.glass-text .label {
  font-size: 10px;
}

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

.add-water-btn,
.reset-water-btn {
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.add-water-btn {
  min-height: 38px;
  padding: 0 16px;
  background: linear-gradient(135deg, var(--green), var(--blue));
  color: #ffffff;
  font-size: 13px;
  font-weight: 800;
}

.reset-water-btn {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.expenditure-metrics,
.weight-chart-container {
  display: grid;
  gap: 16px;
}

.exp-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.exp-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 6px solid var(--amber);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.exp-val {
  font-size: 18px;
  font-weight: 900;
  color: var(--green-deep);
}

.exp-lbl {
  font-size: 9px;
  color: var(--muted);
}

.exp-info strong {
  display: block;
  font-size: 15px;
}

.exp-info p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.steps-meta {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}

.steps-bar {
  height: 8px;
  border-radius: 999px;
  background: #eef2f7;
  overflow: hidden;
}

.steps-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--amber), var(--sun));
  animation: fillGrow 1.1s ease-out both;
}

.weight-chart {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px;
}

.weight-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.weight-meta .meta-item {
  padding: 8px 12px;
  border-radius: 8px;
  background: #f8fafc;
}

.weight-meta .label {
  display: block;
  font-size: 10px;
  color: var(--muted);
}

.weight-meta .value {
  font-size: 15px;
  font-weight: 900;
}

.val-green { color: var(--green); }
.val-gold { color: var(--amber); }

/* 时间线 */
.timeline-section {
  background:
    linear-gradient(180deg, #f8fdff 0%, #f3fff8 46%, #ffffff 100%);
}

.timeline-container {
  max-width: 920px;
  margin: 48px auto 0;
  position: relative;
  padding: 12px 0;
}

.timeline-line {
  position: absolute;
  left: 118px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: rgba(14, 165, 233, 0.14);
}

.timeline-progress {
  width: 100%;
  height: 0;
  background: linear-gradient(180deg, var(--green), var(--blue), var(--sun));
  transition: height 0.45s ease;
}

.timeline-steps {
  display: grid;
  gap: 28px;
}

.timeline-step {
  display: flex;
  align-items: flex-start;
  gap: 0;
  cursor: pointer;
}

.timeline-time {
  width: 88px;
  padding-top: 18px;
  text-align: right;
  font-family: "Outfit", sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}

.timeline-node {
  width: 60px;
  display: flex;
  justify-content: center;
  padding-top: 18px;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid rgba(16, 185, 129, 0.25);
  transition: transform 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.timeline-card {
  flex: 1;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.timeline-tag {
  display: inline-flex;
  padding: 4px 10px;
  margin-bottom: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(21, 201, 135, 0.12), rgba(251, 191, 36, 0.14));
  color: var(--green-deep);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.timeline-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.timeline-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.timeline-step.active .timeline-time {
  color: var(--green-deep);
}

.timeline-step.active .timeline-dot {
  transform: scale(1.25);
  background: var(--sun);
  border-color: var(--green);
}

.timeline-step.active .timeline-card {
  transform: translateX(6px);
  border-color: rgba(14, 165, 233, 0.28);
  box-shadow: 0 26px 60px -34px rgba(14, 165, 233, 0.35);
}

/* 使用场景 / 信任 / FAQ */
.use-case-section {
  background:
    linear-gradient(180deg, #ffffff 0%, #f4fff8 100%);
}

.use-case-grid,
.trust-grid,
.faq-grid {
  display: grid;
  gap: 20px;
}

.use-case-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.trust-section {
  background:
    linear-gradient(150deg, #07352d 0%, #0b5b4c 48%, #0f766e 100%);
  color: #ecfdf5;
}

.trust-section h2,
.trust-section h3 {
  color: #ffffff;
}

.trust-section .section-heading p {
  color: rgba(236, 253, 245, 0.84);
}

.trust-shell {
  display: block;
}

.trust-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.trust-section .section-heading {
  max-width: 820px;
}

.trust-section .trust-item,
.faq-section .faq-item {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: none;
}

.trust-section .trust-item:hover,
.faq-section .faq-item:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(251, 191, 36, 0.34);
  box-shadow: 0 28px 70px -42px rgba(251, 191, 36, 0.36);
}

.trust-item,
.use-case-item,
.faq-item {
  padding: 28px;
  min-height: 220px;
}

.section-dark .trust-item,
.section-dark .faq-item {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.use-case-icon,
.trust-icon {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(21, 201, 135, 0.14), rgba(14, 165, 233, 0.12));
  color: var(--green);
}

.trust-icon {
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.11);
  color: #fef3c7;
}

.use-case-item h3,
.trust-item h3,
.faq-item h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.use-case-item p,
.trust-item p,
.faq-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.trust-section .trust-item p,
.faq-section p {
  color: rgba(236, 253, 245, 0.82);
}

.faq-section {
  background:
    linear-gradient(180deg, #fff8ed 0%, #f3fff8 54%, #eefaff 100%);
  color: var(--ink);
}

.faq-section h2,
.faq-section h3 {
  color: var(--green-deep);
}

.faq-section .section-heading p {
  color: var(--muted);
}

.faq-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.faq-section .faq-item {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(8, 91, 76, 0.12);
  box-shadow: var(--shadow);
}

.faq-section .faq-item p {
  color: var(--muted);
}

.faq-section .faq-item:hover {
  background: #ffffff;
  border-color: rgba(255, 122, 26, 0.26);
  box-shadow: 0 28px 70px -38px rgba(255, 122, 26, 0.32);
}

/* 文章列表 */
.article-band .section-heading h2 {
  color: #ffffff;
}

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

.article-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(16, 185, 129, 0.28);
}

.article-card-image-wrapper {
  aspect-ratio: 1.6;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(14, 165, 233, 0.08)),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.07) 0 1px, transparent 1px 14px);
  color: #d1fae5;
  padding: 20px;
}

.article-card-image-wrapper.has-image {
  padding: 0;
  background: #f3fff8;
}

.article-card-image,
.article-hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card-image-wrapper .slot-icon {
  color: #6ee7b7;
}

.article-card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-card-meta,
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: #6ee7b7;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.article-card h3 {
  margin: 12px 0 8px;
  font-size: 20px;
  line-height: 1.25;
  color: #ffffff;
}

.article-card p {
  margin: 0;
  color: rgba(236, 253, 245, 0.68);
  font-size: 14px;
  line-height: 1.6;
}

.index-grid .article-card {
  border-color: var(--line);
  background: #ffffff;
  box-shadow: var(--shadow);
}

.index-grid .article-card:hover {
  border-color: rgba(14, 165, 233, 0.28);
  box-shadow: var(--shadow-hover);
}

.index-grid .article-card-meta {
  color: var(--blue);
}

.index-grid .article-card h3 {
  color: var(--green-deep);
}

.index-grid .article-card p {
  color: var(--muted);
}

.index-grid .article-card-image-wrapper {
  border-bottom: 1px solid var(--line);
}

.index-grid .article-card-image-wrapper.media-slot {
  color: var(--green-deep);
}

.index-grid .article-card-image-wrapper.media-slot .slot-icon {
  color: var(--green);
}

.empty-state {
  grid-column: 1 / -1;
  padding: 36px;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  text-align: center;
  color: rgba(236, 253, 245, 0.68);
}

.index-grid .empty-state {
  border-color: var(--line);
  color: var(--muted);
  background: #ffffff;
  box-shadow: var(--shadow);
}

/* 下载 CTA */
.download-cta-band {
  padding: 88px 0;
  background:
    linear-gradient(135deg, #0f766e 0%, var(--green) 42%, var(--blue) 74%, var(--sun) 100%);
  color: #ecfdf5;
  position: relative;
  overflow: hidden;
}

.download-cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.22;
  animation: gridDrift 16s linear infinite;
}

.download-cta-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(220px, 0.8fr);
  gap: 40px;
  align-items: center;
}

.download-cta-copy h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: #ffffff;
}

.download-cta-copy p {
  margin: 18px 0 0;
  max-width: 560px;
  color: rgba(236, 253, 245, 0.76);
  font-size: 18px;
  line-height: 1.7;
}

.download-cta-visual {
  display: flex;
  justify-content: center;
}

.download-cta-icon {
  border-radius: 28px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.28);
  animation: iconPop 5.5s ease-in-out infinite;
}

/* 页脚 */
.site-footer {
  padding: 72px 0;
  background: #041d18;
  color: #d1fae5;
}

.footer-shell {
  display: flex;
  justify-content: space-between;
  gap: 40px;
}

.site-footer p {
  max-width: 480px;
  margin: 16px 0 0;
  color: rgba(209, 250, 229, 0.62);
  font-size: 14px;
  line-height: 1.65;
}

.footer-links {
  display: flex;
  gap: 22px;
  align-items: center;
  font-size: 14px;
  font-weight: 700;
}

.footer-links a:hover {
  color: #6ee7b7;
}

/* 文章页 */
.page-hero {
  padding: 88px 0 56px;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  max-width: 860px;
}

.page-hero p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.breadcrumb a {
  color: var(--green);
}

.topic-hero {
  background:
    linear-gradient(135deg, rgba(21, 201, 135, 0.14), rgba(14, 165, 233, 0.1)),
    linear-gradient(180deg, #ffffff 0%, #f3fff8 100%);
}

.topic-hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.topic-hero-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 800;
}

.topic-content-section {
  background: #ffffff;
}

.topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 56px;
  align-items: start;
}

.topic-main {
  display: grid;
  gap: 26px;
}

.topic-section,
.topic-faq-block,
.topic-aside-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.topic-section,
.topic-faq-block {
  padding: 34px;
}

.topic-section h2,
.topic-faq-block h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}

.topic-section p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.topic-section ul {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.topic-section li {
  position: relative;
  padding-left: 26px;
  color: var(--ink);
  line-height: 1.7;
}

.topic-section li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--blue));
}

.topic-faq-list {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.topic-faq-list article {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.topic-faq-list h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.topic-faq-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.topic-aside {
  position: sticky;
  top: 108px;
  display: grid;
  gap: 18px;
}

.topic-aside-card {
  padding: 24px;
}

.topic-aside-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.topic-aside-card p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.7;
}

.topic-related-links {
  display: grid;
  gap: 10px;
}

.topic-related-links a {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--green-deep);
  font-weight: 800;
}

.article-detail {
  background: var(--dark);
}

.article-hero {
  padding: 48px 0;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 48px;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-hero-copy h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: #ffffff;
}

.article-hero-copy p {
  margin: 18px 0 0;
  color: rgba(236, 253, 245, 0.72);
  font-size: 18px;
  line-height: 1.65;
}

.article-hero-image-wrapper {
  aspect-ratio: 1.6;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.article-hero-image,
.article-hero-image-slot {
  width: 100%;
  height: 100%;
}

.article-hero-image {
  object-fit: cover;
}

.article-hero-image-slot {
  color: #d1fae5;
  border-color: rgba(110, 231, 183, 0.28);
}

.article-layout {
  padding: 56px 0 112px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 64px;
}

.article-body {
  max-width: 680px;
  font-size: 18px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.88);
}

.article-body p,
.article-body li,
.article-body span,
.article-body div {
  color: rgba(255, 255, 255, 0.88);
}

.article-body a {
  color: var(--green);
  font-weight: 600;
}

.article-body h2 {
  margin: 48px 0 18px;
  font-size: 28px;
  color: #ffffff;
}

.article-body h3 {
  margin: 32px 0 14px;
  font-size: 22px;
  color: #ffffff;
}

.article-body blockquote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 4px solid var(--green);
  border-radius: 0 16px 16px 0;
  background: rgba(16, 185, 129, 0.08);
}

.article-aside {
  position: sticky;
  top: 108px;
  align-self: start;
  padding-left: 28px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.compact-links {
  display: grid;
  gap: 14px;
}

.compact-links a {
  display: block;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.compact-links span {
  display: block;
  margin-bottom: 6px;
  color: #6ee7b7;
  font-size: 12px;
  font-weight: 800;
}

.compact-links strong {
  color: #ffffff;
  font-size: 15px;
  line-height: 1.4;
}

.premium-cta-card {
  margin-top: 64px;
  padding: 40px;
  border-radius: var(--radius-xl);
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.cta-content-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.cta-eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: #ecfdf5;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.cta-title {
  margin: 0 0 12px;
  font-size: 34px;
  color: #ffffff;
}

.cta-desc {
  margin: 0 0 28px;
  max-width: 460px;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.75;
}

.cta-floating-icon {
  width: 120px;
  border-radius: 28px;
}

.not-found {
  min-height: 50vh;
  display: flex;
  align-items: center;
}

/* 下载按钮 */
.premium-download-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--green), var(--blue));
  color: #ffffff;
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(14, 165, 233, 0.24);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.premium-download-btn-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1;
}

.premium-download-btn .btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
}

.premium-download-btn .badge-tag {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
}

.premium-download-btn .badge-title {
  font-family: "Outfit", sans-serif;
  font-size: 15px;
  font-weight: 800;
}

.premium-download-btn .btn-shimmer {
  position: absolute;
  inset: 0 auto 0 -120%;
  width: 60%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
  transform: skewX(-18deg);
  transition: left 0.7s ease;
}

.premium-download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 38px rgba(14, 165, 233, 0.34);
}

.premium-download-btn:hover .btn-shimmer {
  left: 140%;
}

/* 动效 */
.reveal {
  opacity: 1;
  transform: none;
}

@keyframes deviceFloat {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

@keyframes chipFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

@keyframes auroraShift {
  from { transform: translateX(-2%) skewY(-3deg); }
  to { transform: translateX(2%) skewY(-3deg); }
}

@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 48px 48px, 48px 48px; }
}

@keyframes iconPop {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-8px) scale(1.035); }
}

@keyframes slotSweep {
  0%, 72% { transform: translateX(-120%); }
  100% { transform: translateX(120%); }
}

@keyframes barPulse {
  0%, 100% { filter: saturate(1); }
  50% { filter: saturate(1.25) brightness(1.08); }
}

@keyframes fillGrow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@keyframes ringDash {
  from { stroke-dashoffset: 314.16; }
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero-shell,
  .trust-shell,
  .download-cta-shell,
  .article-hero,
  .article-layout,
  .topic-layout {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: none;
  }

  .hero-actions,
  .hero-metrics {
    justify-content: flex-start;
  }

  .product-visual {
    min-height: 500px;
  }

  .coach-chip {
    left: 50%;
    right: auto;
    bottom: 0;
    width: min(300px, calc(100% - 32px));
    min-width: 0;
    transform: translateX(-50%);
    animation: none;
  }

  .coach-chip:hover {
    transform: translateX(-50%) translateY(-4px);
  }

  .feature-grid,
  .seo-topic-grid,
  .metrics-dashboard-grid,
  .use-case-grid,
  .trust-grid,
  .faq-grid,
  .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-aside {
    position: static;
  }

  .split-heading {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .section-shell,
  .nav-shell,
  .footer-shell,
  .hero-shell,
  .article-hero,
  .article-layout,
  .article-breadcrumb-shell {
    width: min(100% - 32px, 1160px);
  }

  .nav-shell {
    min-height: 68px;
    gap: 12px;
  }

  .brand-link {
    gap: 8px;
  }

  .nav-links {
    gap: 10px;
  }

  .nav-links a:not(.language-switch):not(.nav-download-link) {
    display: none;
  }

  .nav-download-link {
    min-width: 42px;
    padding: 0 12px;
  }

  .hero-section {
    padding-top: 28px;
  }

  .hero-shell {
    gap: 34px;
  }

  .product-visual {
    min-height: 430px;
  }

  .hero-shot-frame {
    width: min(100%, 420px);
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .seo-topic-grid,
  .metrics-dashboard-grid,
  .use-case-grid,
  .trust-grid,
  .faq-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .section-block,
  .article-layout {
    padding: 80px 0;
  }

  .footer-shell {
    flex-direction: column;
  }

  .carousel-btn {
    display: none;
  }

  .screenshots-container {
    mask-image: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .screenshot-card {
    flex: 0 0 260px;
    scroll-snap-align: center;
  }

  .timeline-line {
    left: 18px;
  }

  .timeline-time {
    display: none;
  }

  .timeline-node {
    width: 40px;
    justify-content: flex-start;
    padding-left: 8px;
  }

  .timeline-step.active .timeline-card {
    transform: none;
  }

  .cta-content-layout {
    flex-direction: column;
    text-align: center;
  }

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

@media (max-width: 420px) {
  .brand-link span {
    display: none;
  }

  .nav-download-link span {
    display: none;
  }

  .language-switch {
    padding: 0 12px;
  }

  .premium-download-btn {
    width: 100%;
  }

  .hero-actions {
    width: 100%;
  }

  .button-secondary {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}