/* ============================================================
   LEYU 手机版 · 共享样式 /assets/site.css
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --primary-green: #00A651;
  --passion-red: #E4002B;
  --night-blue: #1A2A3A;
  --fog-white: #F5F7FA;
  --ash-gray: #2E3A46;
  --silver-line: #B0B8C0;
  --amber-accent: #FFC107;
  --ink-black: #11151A;
  --mist-green: #C8E6C9;
  --blush-red: #FFCDD2;
  --font-heading: "Montserrat", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: "Roboto Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;
  --header-height: 72px;
  --rail-width: 72px;
  --tabbar-height: 64px;
  --container-max: 1200px;
  --radius-card: 20px;
  --radius-pill: 999px;
  --line-width: 2px;
}

/* ---------- 2. Reset 与基础 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-black);
  background-color: var(--fog-white);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
img, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}
button, input, select, textarea {
  font: inherit;
  color: inherit;
}
button {
  background: none;
  border: none;
  cursor: pointer;
}
a {
  color: var(--primary-green);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
ul, ol {
  list-style-position: outside;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ink-black);
  letter-spacing: -0.01em;
}
h1 {
  font-size: clamp(2rem, 5.5vw, 3.5rem);
}
h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
}
h3 {
  font-size: 1.25rem;
}
p {
  margin: 0;
}
:focus-visible {
  outline: 3px solid var(--amber-accent);
  outline-offset: 3px;
  border-radius: 6px;
}
::selection {
  background: var(--primary-green);
  color: #fff;
}

/* ---------- 3. 布局骨架 ---------- */
.container {
  width: min(var(--container-max), 100% - 40px);
  margin-inline: auto;
}
@media (min-width: 768px) {
  .container {
    width: min(var(--container-max), 100% - 64px);
  }
}
.site-main {
  display: block;
  min-height: 70vh;
}
@media (min-width: 1024px) {
  .site-main {
    margin-left: var(--rail-width);
  }
}
.section {
  padding: 64px 0;
}
.section-tight {
  padding: 32px 0;
}
.section-dark {
  background: var(--night-blue);
  color: var(--fog-white);
}
.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--fog-white);
}
.section-dark .lead {
  color: var(--silver-line);
}
@media (min-width: 768px) {
  .section {
    padding: 96px 0;
  }
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary-green);
}
.section-label::before {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--primary-green);
  background: radial-gradient(circle, var(--passion-red) 0 2px, transparent 3px);
}
.section-dark .section-label {
  color: var(--primary-green);
}

/* ---------- 4. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 2000;
  background: transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled,
.site-header.is-nav-open {
  background-color: rgba(26, 42, 58, 0.97);
  box-shadow: 0 1px 0 var(--primary-green), 0 10px 28px rgba(17, 21, 26, 0.28);
}
.top-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: var(--scroll-progress, 0%);
  background: linear-gradient(90deg, var(--primary-green), var(--passion-red));
  z-index: 2400;
  pointer-events: none;
}
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 3000;
  background: var(--primary-green);
  color: #fff;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 10px;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus-visible {
  top: 16px;
}
.brand-rail {
  display: none;
}
@media (min-width: 1024px) {
  .brand-rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--rail-width);
    padding: 20px 0 24px;
    background: var(--night-blue);
    border-right: 1px solid var(--ash-gray);
    z-index: 2300;
  }
  .rail-sigil {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    line-height: 1;
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    border-radius: 12px;
    padding: 8px 10px;
    letter-spacing: 0.02em;
  }
  .rail-coord {
    writing-mode: vertical-rl;
    font-family: var(--font-data);
    font-size: 11px;
    letter-spacing: 0.28em;
    color: var(--silver-line);
    text-transform: uppercase;
  }
  .rail-flag {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--passion-red);
    box-shadow: 0 0 0 4px rgba(228, 0, 43, 0.22);
  }
  .rail-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: var(--scroll-progress, 0%);
    background: linear-gradient(180deg, var(--primary-green), var(--passion-red));
  }
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: var(--header-height);
}
@media (min-width: 1024px) {
  .header-inner {
    width: auto;
    margin-left: var(--rail-width);
    margin-right: 24px;
  }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fog-white);
  flex-shrink: 0;
}
.brand-mark {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-green) 0%, #007A3D 100%);
  border: 2px solid rgba(255, 255, 255, 0.85);
  flex-shrink: 0;
}
.brand-mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: rgba(255, 255, 255, 0.65);
  transform: translateX(-50%);
  border-radius: 2px;
}
.brand-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.brand-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.45rem;
  line-height: 1;
  letter-spacing: 0.06em;
}
.brand-suffix {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--primary-green);
  border: 1px solid var(--primary-green);
  border-radius: 6px;
  padding: 2px 6px;
  letter-spacing: 0.08em;
  margin-left: 2px;
}
.brand-footer {
  color: var(--fog-white);
}
.site-nav {
  height: auto;
}
@media (min-width: 1024px) {
  .site-nav {
    display: flex;
    align-items: center;
  }
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list a {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 10px;
  color: rgba(245, 247, 250, 0.92);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.nav-list a:hover {
  color: var(--primary-green);
}
.nav-list a[aria-current="page"] {
  color: var(--primary-green);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 3px;
  border-radius: 3px;
  background: var(--passion-red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}
.nav-list a:hover::after,
.nav-list a[aria-current="page"]::after {
  transform: scaleX(1);
}
@media (max-width: 1023.98px) {
  .site-nav {
    position: fixed;
    top: calc(var(--header-height) + 10px);
    left: 12px;
    right: 12px;
    z-index: 1600;
    padding: 14px;
    background: var(--night-blue);
    border: var(--line-width) solid var(--primary-green);
    border-radius: var(--radius-card);
    box-shadow: 0 20px 40px rgba(17, 21, 26, 0.42);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.98);
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
    max-height: calc(100vh - var(--header-height) - 20px);
    overflow-y: auto;
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-list a {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
    border-radius: 12px;
  }
  .nav-list a::after {
    display: none;
  }
  .nav-list a:hover,
  .nav-list a[aria-current="page"] {
    background: rgba(0, 166, 81, 0.16);
    color: var(--primary-green);
  }
}
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  border: 2px solid var(--silver-line);
  border-radius: 14px;
  background: rgba(26, 42, 58, 0.4);
  transition: border-color 0.2s, background-color 0.2s, transform 0.15s;
}
.nav-toggle:hover {
  border-color: var(--primary-green);
  background: rgba(26, 42, 58, 0.7);
}
.nav-toggle:active {
  transform: scale(0.96);
}
.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--fog-white);
  transition: transform 0.25s, opacity 0.2s, background-color 0.25s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--primary-green);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--primary-green);
}
@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }
}
.btn-extra {
  display: none;
}
@media (min-width: 768px) {
  .btn-extra {
    display: inline;
  }
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 24px;
  border: 2px solid transparent;
  border-radius: 14px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}
.btn:active {
  transform: scale(0.97);
}
.btn-primary {
  background: var(--primary-green);
  color: #fff;
}
.btn-primary:hover {
  background: #008B43;
  border-color: var(--passion-red);
  box-shadow: 0 8px 18px rgba(0, 166, 81, 0.28);
}
.btn-outline {
  background: transparent;
  color: var(--fog-white);
  border-color: var(--fog-white);
}
.btn-outline:hover {
  background: rgba(245, 247, 250, 0.12);
  border-color: var(--primary-green);
}
.btn-download {
  background: var(--passion-red);
  color: #fff;
  flex-shrink: 0;
}
.btn-download:hover {
  background: #b9001f;
  border-color: var(--primary-green);
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--night-blue);
  color: var(--fog-white);
  padding-top: 64px;
  padding-bottom: 128px;
}
@media (min-width: 1024px) {
  .site-footer {
    padding-left: var(--rail-width);
    padding-bottom: 48px;
  }
}
.footer-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--ash-gray);
}
.footer-brand {
  display: grid;
  gap: 16px;
  align-content: start;
}
.footer-tagline {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: var(--primary-green);
  border-left: 4px solid var(--passion-red);
  padding-left: 12px;
  line-height: 1.4;
}
.footer-note {
  font-size: 14px;
  color: var(--silver-line);
  max-width: 34em;
}
.footer-col {
  display: grid;
  gap: 12px;
  align-content: start;
}
.footer-title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-line);
  border-bottom: 1px solid var(--ash-gray);
  padding-bottom: 10px;
  margin-bottom: 4px;
}
.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
}
.footer-list a {
  color: var(--fog-white);
  text-decoration: none;
  display: inline-block;
  padding: 2px 0;
  transition: color 0.2s;
}
.footer-list a:hover {
  color: var(--primary-green);
}
.footer-contact .footer-list {
  color: var(--silver-line);
}
.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 0 0;
  font-size: 13px;
  color: var(--silver-line);
}
.footer-copy {
  margin: 0;
}
.footer-icp {
  margin: 0;
  font-family: var(--font-data);
  letter-spacing: 0.06em;
}
@media (min-width: 768px) {
  .footer-main {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}
@media (min-width: 1200px) {
  .footer-main {
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  }
}

/* 移动端底部标签栏 */
.mobile-tabbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  min-height: var(--tabbar-height);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--night-blue);
  border-top: var(--line-width) solid var(--primary-green);
  z-index: 2400;
}
@media (min-width: 1024px) {
  .mobile-tabbar {
    display: none;
  }
}
.tabbar-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--silver-line);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  position: relative;
  min-height: var(--tabbar-height);
  transition: color 0.2s;
}
.tabbar-item::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  width: 28px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--passion-red);
  transform: translateX(-50%) scaleX(0);
  transition: transform 0.2s;
}
.tabbar-item:hover {
  color: var(--primary-green);
}
.tabbar-item[aria-current="page"] {
  color: var(--primary-green);
}
.tabbar-item[aria-current="page"]::before {
  transform: translateX(-50%) scaleX(1);
}
.tabbar-icon {
  width: 22px;
  height: 22px;
  display: block;
}
.tabbar-icon svg {
  display: block;
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.tabbar-label {
  line-height: 1.2;
}

/* ---------- 7. 内容组件 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-size: 14px;
}
.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--silver-line);
  font-family: var(--font-data);
}
.breadcrumb a {
  color: var(--primary-green);
  text-decoration: none;
}
.breadcrumb a:hover {
  text-decoration: underline;
}
.breadcrumb [aria-current="page"] {
  color: var(--ash-gray);
  font-weight: 600;
}
.page-hero {
  background: var(--night-blue);
  color: var(--fog-white);
  padding: calc(var(--header-height) + 56px) 0 48px;
  border-bottom: var(--line-width) solid var(--primary-green);
}
.page-hero h1 {
  color: var(--fog-white);
}
.page-hero .breadcrumb {
  margin-bottom: 8px;
}
.page-hero .breadcrumb [aria-current="page"] {
  color: var(--silver-line);
}
.page-title {
  margin: 8px 0 0;
}
.page-lead {
  margin-top: 8px;
  font-size: 18px;
  color: var(--silver-line);
  max-width: 34em;
}
.stage-dark {
  min-height: 88vh;
  display: flex;
  align-items: center;
  background: var(--night-blue);
  color: var(--fog-white);
  border-bottom: var(--line-width) solid var(--primary-green);
}
.stage-dark h1,
.stage-dark h2,
.stage-dark h3 {
  color: var(--fog-white);
}
.stage-dark .lead {
  color: var(--silver-line);
}
.lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--ash-gray);
}

.grid {
  display: grid;
  gap: 24px;
}
.grid-2 {
  grid-template-columns: 1fr;
}
.grid-3 {
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: #fff;
  border: var(--line-width) solid var(--silver-line);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: 0 4px 16px rgba(17, 21, 26, 0.05);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  border-color: var(--primary-green);
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(0, 166, 81, 0.12);
}
.card-dark {
  background: var(--night-blue);
  border-color: var(--ash-gray);
  color: var(--fog-white);
}
.card-dark h1,
.card-dark h2,
.card-dark h3,
.card-dark h4 {
  color: var(--fog-white);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  line-height: 1.4;
}
.tag-green {
  background: var(--mist-green);
  color: #00592E;
}
.tag-red {
  background: var(--blush-red);
  color: #8E0019;
}
.tag-live {
  background: var(--passion-red);
  color: #fff;
}
.tag-live::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #fff;
  animation: leyu-pulse 1.8s ease-out infinite;
}
@keyframes leyu-pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.45;
    transform: scale(0.8);
  }
}

.stat-value {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--primary-green);
  letter-spacing: -0.02em;
}
.stat-red {
  color: var(--passion-red);
}

.table-scroll {
  overflow-x: auto;
  border-radius: 16px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--ink-black);
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
}
.data-table th {
  background: var(--night-blue);
  color: var(--fog-white);
  text-align: left;
  padding: 14px 16px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--silver-line);
  font-variant-numeric: tabular-nums;
}
.data-table tbody tr:last-child td {
  border-bottom: none;
}
.data-table tbody tr:hover td {
  background: rgba(0, 166, 81, 0.06);
}
.data-table .is-hot td {
  background: var(--mist-green);
  font-weight: 700;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--line-width) solid var(--silver-line);
  border-radius: 18px;
  background: var(--ash-gray);
  aspect-ratio: 4 / 3;
  display: block;
}
.media-frame::before {
  content: "\25C6";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 22px;
  color: var(--silver-line);
  background: repeating-linear-gradient(45deg, rgba(176, 184, 192, 0.08) 0 12px, transparent 12px 24px);
}
.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame:has(img)::before {
  display: none;
}
.media-frame.is-wide {
  aspect-ratio: 16 / 7;
}
.media-frame.is-square {
  aspect-ratio: 1 / 1;
}

.legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  flex-shrink: 0;
}
.legend-dot-green {
  background: var(--primary-green);
}
.legend-dot-red {
  background: var(--passion-red);
}
.legend-dot-blue {
  background: var(--night-blue);
}
.legend-dot-amber {
  background: var(--amber-accent);
}

.prose {
  font-size: 16px;
}
.prose > * + * {
  margin-top: 1.4em;
}
.prose ul,
.prose ol {
  padding-left: 1.5em;
}
.prose li {
  margin-top: 0.4em;
}
.prose h2,
.prose h3 {
  margin-top: 1.6em;
}
.prose a {
  color: var(--primary-green);
}
.prose blockquote {
  margin: 0;
  padding: 16px 20px;
  border-left: 4px solid var(--primary-green);
  background: rgba(0, 166, 81, 0.06);
  border-radius: 0 12px 12px 0;
  color: var(--ash-gray);
}
hr {
  border: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-green), transparent);
  border-radius: 2px;
  margin: 48px 0;
}

.phone-shell {
  position: relative;
  width: min(280px, 78vw);
  aspect-ratio: 9 / 19;
  border-radius: 44px;
  border: 6px solid var(--ink-black);
  background: var(--ink-black);
  box-shadow: 0 30px 60px rgba(17, 21, 26, 0.35), 0 0 0 2px var(--silver-line);
  padding: 14px;
}
.phone-shell::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 72px;
  height: 16px;
  border-radius: 16px;
  background: var(--ink-black);
  z-index: 2;
}
.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 30px;
  background: var(--night-blue);
  overflow: hidden;
  border: 1px solid var(--ash-gray);
}
.stripe {
  display: block;
  height: 8px;
  width: 120px;
  background: linear-gradient(90deg, var(--primary-green) 0 60%, var(--passion-red) 60% 100%);
  transform: skewX(-24deg);
  border-radius: 8px;
}

/* ---------- 8. 工具类 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 9. 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  .tag-live::before {
    animation: none;
  }
  .card:hover {
    transform: none;
  }
  .btn:active {
    transform: none;
  }
}