/* ==========================================================================
   C盘扩容分区大师 · 落地页
   ========================================================================== */

:root {
  --brand: #0bbfa0;
  --brand-600: #03a98c;
  --brand-700: #068d76;
  --brand-soft: #e8faf5;
  --brand-line: #c9eee5;
  --ink: #122029;
  --body: #4e606c;
  --muted: #6b7d88;
  --bg: #ffffff;
  --soft: #f4faf8;
  --line: #e5efec;
  --danger: #ff4d4f;
  --amber: #f7a637;
  --navy: #0b302b;
  --maxw: 1200px;
  --pad: 24px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-sc: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
h1, h2, h3, p, ul, figure { margin: 0; padding: 0; }
ul { list-style: none; }
em { font-style: normal; }

::selection { background: rgba(11, 191, 160, 0.2); }

:focus-visible {
  outline: 3px solid rgba(11, 191, 160, 0.55);
  outline-offset: 3px;
  border-radius: 6px;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.i {
  width: 1.15em;
  height: 1.15em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

.nowrap { white-space: nowrap; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  font-size: 14px;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- 按钮 ---------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 44px;
  padding: 0 24px;
  border: 0;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  color: #fff;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background-color 0.22s ease;
}

.btn-primary {
  background: linear-gradient(120deg, #12d2ad 0%, #05a98c 100%);
  box-shadow: 0 10px 22px -8px rgba(5, 169, 140, 0.65);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -8px rgba(5, 169, 140, 0.7);
}
.btn-primary:active { transform: translateY(0); }

.btn-lg {
  height: 58px;
  padding: 0 34px;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  min-width: 208px;
}
.btn-lg .i { width: 1.05em; height: 1.05em; stroke-width: 2; }

.btn-lg::after {
  content: "";
  position: absolute;
  top: -160%;
  left: -70%;
  width: 38%;
  height: 420%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0));
  transform: rotate(24deg);
  animation: btnShine 3.6s ease-in-out infinite;
}

@keyframes btnShine {
  0%, 55% { left: -70%; }
  100% { left: 150%; }
}

.btn-header {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
  border-radius: 9px;
  flex: none;
}

/* ---------- 顶部导航 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  transition: box-shadow 0.25s ease;
}
.site-header.is-scrolled { box-shadow: 0 2px 16px rgba(16, 50, 44, 0.08); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 36px;
  height: 76px;
}

.brand { display: flex; align-items: center; flex: none; }
.brand img { height: 34px; width: auto; }

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-nav a {
  font-size: 15px;
  color: #45565f;
  transition: color 0.2s ease;
}
.site-nav a:hover { color: var(--brand-600); }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 68px;
  background:
    radial-gradient(760px 460px at 82% 34%, rgba(11, 191, 160, 0.1), rgba(255, 255, 255, 0) 65%),
    radial-gradient(520px 360px at 4% 10%, rgba(42, 125, 225, 0.06), rgba(255, 255, 255, 0) 70%),
    #fff;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 588px);
  align-items: center;
  gap: 52px;
}

.hero-copy h1 {
  font-size: clamp(38px, 4.2vw, 54px);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.hero-sub {
  margin-top: 22px;
  max-width: 520px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--body);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  font-size: 14px;
  color: #33544d;
}
.hero-points li { display: flex; align-items: center; gap: 6px; }
.hero-points .i { color: var(--brand); width: 17px; height: 17px; stroke-width: 2.4; }

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 34px;
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand-700);
}
.link-more .i { transition: transform 0.2s ease; }
.link-more:hover .i { transform: translateX(4px); }

.hero-meta {
  margin-top: 26px;
  font-size: 12.5px;
  line-height: 1.9;
  color: #74858f;
}

.hero-visual {
  position: relative;
  padding: 10px 0 0;
}

.hero-visual .glow {
  position: absolute;
  inset: 12% -6% -6% 6%;
  background: radial-gradient(closest-side, rgba(11, 191, 160, 0.24), rgba(11, 191, 160, 0));
  filter: blur(18px);
  z-index: 0;
}

.shot {
  position: relative;
  z-index: 1;
  background: #fff;
  border: 1px solid #e7f1ee;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 34px 70px -28px rgba(9, 63, 52, 0.35);
  animation: floaty 7s ease-in-out infinite;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.shot-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 14px;
  background: #f7fbfa;
  border-bottom: 1px solid #edf5f2;
}
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-r { background: #ff6b5e; }
.dot-y { background: #ffc04d; }
.dot-g { background: #33c48b; }
.shot-name {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: #8c9c97;
  white-space: nowrap;
}
.shot img { width: 100%; }

.shot-caption {
  position: relative;
  z-index: 1;
  margin-top: 12px;
  text-align: center;
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 兼容性条 ---------- */

.trust {
  background: #f4fbf9;
  padding: 18px 0;
}
.trust-list {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 14px;
  color: #3c5a54;
}
.trust-list li { display: flex; align-items: center; gap: 8px; }
.trust-list .i { width: 18px; height: 18px; color: var(--brand-600); }

/* ---------- 通用区块 ---------- */

.section {
  padding: 96px 0;
  scroll-margin-top: 90px;
}
.section-soft { background: var(--soft); }

.section-head {
  max-width: 760px;
  margin: 0 auto 54px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(28px, 3.1vw, 38px);
  line-height: 1.32;
  letter-spacing: -0.015em;
  font-weight: 700;
  color: var(--ink);
  text-wrap: balance;
}
.section-head h2 em { color: var(--brand-600); }
.section-head p {
  margin: 16px auto 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  text-wrap: pretty;
}

.center-action {
  margin-top: 50px;
  text-align: center;
}
.action-note {
  margin-top: 13px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 问题卡片 ---------- */

.problem-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.problem-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.problem-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-line);
  box-shadow: 0 22px 44px -24px rgba(9, 63, 52, 0.35);
}

.problem-media {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 10;
  padding: 14px;
  background: #f7fbfa;
}
.problem-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.problem-media-contain img { max-width: 72%; }

.problem-body { padding: 24px 26px 28px; }
.problem-body h3 {
  font-size: 21px;
  font-weight: 700;
  line-height: 1.4;
}
.problem-body p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
}

/* ---------- 功能网格 ---------- */

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

.feature-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 26px 24px 24px;
  background: #fff;
  border: 1px solid #e4f0ec;
  border-radius: 16px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--brand-line);
  box-shadow: 0 18px 36px -22px rgba(9, 63, 52, 0.32);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand-600);
}
.feature-icon .i { width: 27px; height: 27px; }

.feature-card h3 {
  margin-top: 18px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
}
.feature-card p {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--body);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-700);
}
.feature-link .i { width: 16px; height: 16px; transition: transform 0.2s ease; }
.feature-link:hover .i { transform: translateX(4px); }

/* ---------- 场景 ---------- */

.scenario-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.scenario-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.scenario-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-line);
  box-shadow: 0 22px 44px -24px rgba(9, 63, 52, 0.35);
}

.scenario-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 246px;
  padding: 18px;
  background: #f7fbfa;
}
.scenario-media > img {
  max-width: 94%;
  max-height: 100%;
  object-fit: contain;
}

.pie-tag {
  position: absolute;
  padding: 7px 12px;
  background: #fff;
  border: 1px solid #ffe3cb;
  border-radius: 10px;
  font-size: 12.5px;
  line-height: 1.4;
  color: #6b4a2a;
  box-shadow: 0 8px 18px -10px rgba(120, 80, 30, 0.4);
}
.pie-tag em { display: block; color: #f2743a; font-size: 12px; }
.pie-tag-d { top: 16px; left: 12px; }
.pie-tag-c { right: 12px; bottom: 18px; }

.shield-tag {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  padding: 7px 14px;
  background: #fff;
  border: 1px solid var(--brand-line);
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--brand-700);
  white-space: nowrap;
  box-shadow: 0 8px 18px -10px rgba(9, 63, 52, 0.35);
}

.scenario-body { padding: 24px 26px 28px; }
.scenario-body h3 { font-size: 21px; font-weight: 700; line-height: 1.4; }
.scenario-body p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
}

/* ---------- 优势 ---------- */

.advantage-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}

.advantage-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 14px;
}
.advantage-icon {
  display: grid;
  place-items: center;
  width: 104px;
  height: 104px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--brand-line);
  color: var(--brand-600);
  box-shadow: 0 14px 30px -22px rgba(9, 63, 52, 0.45);
}
.advantage-icon .i { width: 44px; height: 44px; stroke-width: 1.5; }
.advantage-item h3 { margin-top: 22px; font-size: 20px; font-weight: 700; }
.advantage-item p {
  margin-top: 9px;
  max-width: 240px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
}

/* ---------- 扩容效果 ---------- */

.result-panel {
  max-width: 960px;
  margin: 0 auto;
  padding: 34px 38px 36px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 26px 60px -38px rgba(9, 63, 52, 0.45);
}

.result-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.result-title { display: flex; align-items: center; gap: 12px; }
.disk-ic {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand-600);
}
.disk-ic .i { width: 23px; height: 23px; }
.result-title strong { display: block; font-size: 16px; }
.result-title span { display: block; font-size: 12.5px; color: var(--muted); }

.legend { display: flex; gap: 18px; font-size: 12.5px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.legend i { display: inline-block; width: 18px; height: 8px; border-radius: 4px; }
.lg-before { border: 1px dashed var(--brand-600); background: #fff; }
.lg-after { background: linear-gradient(90deg, #15d6b0, #05a98c); }

.drive { margin-top: 24px; }
.drive-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  color: var(--body);
  font-variant-numeric: tabular-nums;
}
.drive-name b { color: var(--ink); font-size: 15px; }
.drive-num b { color: var(--ink); }
.drive-bar {
  position: relative;
  height: 26px;
  margin-top: 10px;
  background: #eef4f2;
  border-radius: 8px;
  overflow: hidden;
}
.bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  border-radius: 8px;
  background: linear-gradient(90deg, #15d6b0, #05a98c);
  transition: width 0.4s cubic-bezier(0.22, 0.7, 0.3, 1);
}
.drive-bar-d .bar-fill { background: #9ad9cb; }
.bar-before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 33.333%;
  border-right: 2px dashed #fff;
  z-index: 2;
  pointer-events: none;
}

.slider-block { margin-top: 30px; }
.slider-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  color: var(--body);
}
.slider-head output {
  font-size: 20px;
  font-weight: 700;
  color: var(--brand-700);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 28px;
  margin: 10px 0 0;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--brand) 0 var(--p, 50%), #e3f0ec var(--p, 50%) 100%);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -7px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--brand);
  box-shadow: 0 2px 8px rgba(9, 63, 52, 0.28);
}
input[type="range"]::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: #e3f0ec;
}
input[type="range"]::-moz-range-progress {
  height: 8px;
  border-radius: 999px;
  background: var(--brand);
}
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--brand);
}
.slider-scale {
  display: flex;
  justify-content: space-between;
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.result-note {
  margin-top: 18px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}
.result-action { margin-top: 28px; text-align: center; }

/* ---------- 常见问题 ---------- */

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.faq-item[open] {
  border-color: var(--brand-line);
  box-shadow: 0 16px 34px -26px rgba(9, 63, 52, 0.4);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-plus {
  width: 20px;
  height: 20px;
  color: var(--brand-600);
  transition: transform 0.25s ease;
  stroke-width: 2;
}
.faq-item[open] .faq-plus { transform: rotate(45deg); }
.faq-body { padding: 0 22px 22px; }
.faq-body p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--body);
}

/* ---------- 底部下载 ---------- */

.final-cta {
  background: #fff;
  padding: 72px 0;
}
.final-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.final-inner h2 {
  font-size: clamp(24px, 2.7vw, 32px);
  line-height: 1.4;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.final-inner p {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--body);
}
.final-inner .btn { flex: none; }

/* ---------- 页脚 ---------- */

.site-footer {
  background: #0d1a1e;
  padding-top: 60px;
}
.footer-main {
  display: flex;
  justify-content: space-between;
  gap: 60px;
}
.footer-brand { max-width: 340px; }
.footer-brand img {
  height: 32px;
  width: auto;
  opacity: 0.95;
}
.footer-brand p {
  margin-top: 18px;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.5);
}

.footer-links { display: flex; gap: 72px; }
.footer-col h3 {
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}
.footer-col a {
  display: block;
  margin-bottom: 12px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.62);
  transition: color 0.2s ease;
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
  margin-top: 46px;
  padding-top: 22px;
  padding-bottom: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-bottom p {
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.36);
}

/* 公司资质：common.js 的 renderFooter() 按 service 覆写 #companyInfo。
   字号和颜色必须写在容器上 —— 天极那套 COMPANY_INFO 是没有 <p> 的裸文本，
   写进 innerHTML 后是匿名文本节点，只能靠继承上色，否则沿用深色、深底上看不见。 */
.footer-bottom #companyInfo {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.36);
}
.footer-bottom #companyInfo p { margin: 0; }
.footer-bottom #companyInfo a { color: inherit; }
.footer-bottom #companyInfo a:hover { text-decoration: underline; }

/* ---------- 响应式 ---------- */

@media (max-width: 1120px) {
  .site-nav { gap: 22px; }
  .hero-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 500px); gap: 40px; }
  .header-inner { gap: 24px; }
}

@media (max-width: 1024px) {
  .site-nav { display: none; }
  .header-inner { justify-content: space-between; }
  .hero { padding: 56px 0 56px; }
  .hero-inner { grid-template-columns: 1fr; gap: 34px; }
  .hero-copy { max-width: 700px; }
  .hero-visual { max-width: 640px; width: 100%; margin: 0 auto; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advantage-list { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 48px; }
  .section { padding: 84px 0; }
}

@media (max-width: 900px) {
  .trust-list { flex-wrap: wrap; justify-content: flex-start; gap: 12px 28px; }
  .problem-list { grid-template-columns: 1fr; }
  .problem-media { aspect-ratio: 16 / 9; }
  .problem-media-contain img { max-width: 46%; }
  .scenario-list { grid-template-columns: 1fr; }
  .scenario-media { height: 280px; }
  .section-head { margin-bottom: 40px; }
  .result-panel { padding: 26px 24px 28px; }
  .final-inner { flex-direction: column; align-items: flex-start; gap: 28px; }
  .footer-main { flex-direction: column; gap: 40px; }
  .footer-links { gap: 56px; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  :root { --pad: 18px; }
  .site-header .brand img { height: 28px; }
  .btn-header { height: 36px; padding: 0 14px; font-size: 13px; }
  .header-inner { height: 64px; }

  .hero { padding: 40px 0 44px; }
  .hero-copy h1 { font-size: clamp(31px, 8.6vw, 38px); }
  .hero-sub { margin-top: 16px; font-size: 15.5px; }
  .hero-points { gap: 8px 16px; font-size: 13px; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 16px; margin-top: 26px; }
  .btn-lg { width: 100%; height: 54px; font-size: 17px; }
  .link-more { justify-content: center; }
  .hero-meta { margin-top: 18px; }

  .shot-name { display: none; }
  .shot-caption { font-size: 11.5px; }

  .trust { padding: 14px 0; }
  .trust-list { display: grid; grid-template-columns: 1fr; gap: 8px; font-size: 13px; }

  .section { padding: 64px 0; }
  .section-head h2 { font-size: clamp(24px, 6.6vw, 29px); }
  .section-head p { font-size: 14.5px; }

  .problem-body { padding: 20px 20px 24px; }
  .problem-body h3 { font-size: 19px; }
  .problem-body p { font-size: 14.5px; }
  .problem-media-contain img { max-width: 54%; }

  .feature-grid { grid-template-columns: 1fr; gap: 14px; }
  .feature-card { padding: 22px 20px; }
  .feature-icon { width: 46px; height: 46px; }
  .feature-icon .i { width: 24px; height: 24px; }

  .scenario-media { height: 210px; }
  .scenario-body { padding: 20px 20px 24px; }
  .scenario-body h3 { font-size: 19px; }
  .scenario-body p { font-size: 14.5px; }

  .advantage-list { grid-template-columns: 1fr; row-gap: 36px; }
  .advantage-icon { width: 88px; height: 88px; }
  .advantage-icon .i { width: 38px; height: 38px; }
  .advantage-item h3 { margin-top: 16px; font-size: 18px; }
  .advantage-item p { font-size: 14.5px; }

  .result-panel { border-radius: 18px; }
  .result-top { flex-direction: column; align-items: flex-start; gap: 12px; }
  .drive-head { flex-direction: column; gap: 4px; }
  .drive-bar { height: 22px; }
  .slider-head output { font-size: 18px; }
  .result-action .btn { width: 100%; }

  .faq-grid { grid-template-columns: 1fr; gap: 12px; }
  .faq-item summary { padding: 17px 18px; font-size: 15px; }
  .faq-body { padding: 0 18px 18px; }
  .faq-body p { font-size: 14px; }

  .final-cta { padding: 46px 0; }
  .final-inner h2 { font-size: 24px; }
  .final-inner .btn { width: 100%; }

  .site-footer { padding-top: 44px; }
  .footer-links { gap: 36px 48px; }
  .footer-bottom { margin-top: 34px; }
}

/* ---------- 减少动态效果 ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .shot { animation: none; }
}

/* ==========================================================================
   内容图片可点击下载
   ========================================================================== */

img { cursor: pointer; }
.download-guide img { cursor: default; }

/* ==========================================================================
   下载按钮下方软件背书
   ========================================================================== */

.dl-endorse {
  margin-top: 16px;
  font-family: var(--font-sc);
}
.dl-trust {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.dl-endorse.left .dl-trust { align-items: flex-start; }
.dl-trust .ht-logos {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 17px;
}
.dl-trust .ht-logos img {
  height: 38px;
  width: auto;
  display: block;
}
.dl-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
  font-size: 13px;
  line-height: 18px;
  color: #94a3b8;
}
.dl-endorse.left .dl-note { justify-content: flex-start; }
.dl-note svg {
  width: 23px;
  height: 23px;
  flex: none;
  color: #34d399;
}

/* ==========================================================================
   点击下载后的引导浮层
   ========================================================================== */

.download-guide {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: none;
}
.download-guide.show { display: block; }

.dg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  animation: dgFade 0.25s ease;
}

.dg-tip {
  position: absolute;
  top: 0;
  right: 60px;
  width: 494px;
  animation: dgSlide 0.3s ease;
}

.dg-pointer {
  width: 21px;
  height: 16px;
  margin-left: auto;
  margin-right: 24px;
  background: #ebf1ff;
  clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
}

.dg-card {
  margin-top: -1px;
  background: #ebf1ff;
  border-radius: 12px;
  padding: 16px 24px 24px;
  box-shadow: 0 16px 64px 0 rgba(0, 0, 0, 0.12);
}
.dg-card:focus { outline: none; }

.dg-title {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  font-family: Inter, var(--font-sc), sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: #1d2129;
  white-space: nowrap;
}
.dg-quote { color: #007aff; }
.dg-icon { width: 48px; height: 48px; flex: none; }
.dg-icon svg,
.dg-icon img { width: 100%; height: 100%; display: block; }

.dg-file {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  margin-top: 16px;
  background: #ffffff;
  border-radius: 8px;
  font-family: var(--font-sc);
  font-weight: 600;
  font-size: 16px;
  line-height: 24px;
  color: #1d2129;
  white-space: nowrap;
  overflow: hidden;
}
.dg-file img { width: 28px; height: 28px; flex: none; }
.dg-file span { overflow: hidden; text-overflow: ellipsis; }

.dg-safe {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 24px;
  font-family: Inter, var(--font-sc), sans-serif;
  font-weight: 500;
  font-size: 12px;
  line-height: 20px;
  color: #1d2129;
  white-space: nowrap;
}
.dg-safe svg,
.dg-safe img { width: 20px; height: 20px; flex: none; }

.dg-trust {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  white-space: nowrap;
}
.dg-trust > img { height: 38.4px; width: auto; flex: none; }

@keyframes dgFade {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes dgSlide {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
  .dl-endorse { margin-top: 14px; }
  .dl-trust .ht-logos { gap: 8px; }
  .dl-trust .ht-logos img { height: 30px; }
  .dl-note { font-size: 12px; }
  .dl-note svg { width: 20px; height: 20px; }

  .dg-tip {
    width: calc(100% - 24px);
    right: 12px !important;
  }
  .dg-card { padding: 12px 16px 18px; }
  .dg-title { font-size: 16px; height: 40px; gap: 6px; }
  .dg-icon { width: 40px; height: 40px; }
  .dg-file { margin-top: 12px; padding: 6px 12px; font-size: 14px; }
  .dg-safe { margin-top: 16px; font-size: 11px; white-space: normal; }
  .dg-trust { gap: 8px; flex-wrap: wrap; }
  .dg-trust > img { height: 28px; }
}