/* ============================================================================
   磁盘释放大师 — 落地页样式
   冷白底 + 墨蓝字 + 单一品牌蓝；信息用细线和留白分层，不靠满屏阴影卡片。
   ========================================================================== */

:root {
  --ink: #0f1b2d;
  --ink-2: #3c4b62;
  --ink-3: #697992;
  --line: #e2e8f2;
  --line-soft: #eef2f8;
  --bg: #ffffff;
  --bg-alt: #f6f9fd;
  --brand: #2563eb;
  --brand-deep: #1b3fc4;
  --brand-soft: #eaf1fe;
  --ok: #0e9f6e;
  --ok-soft: #e9f8f1;
  --warn: #c2410c;
  --radius: 16px;
  --wrap: 1140px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC",
    "Hiragino Sans GB", "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.78;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* 中文段落避免出现「最后一行只剩一个句号」这种孤字 */
p, li, dd { text-wrap: pretty; }
ul, ol { list-style: none; }
b { font-weight: 700; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------------------------------------------------------- 顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}

.topbar.scrolled { border-bottom-color: var(--line); }

.topbar-inner {
  height: 66px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.nav {
  display: flex;
  gap: 20px;
  margin-left: 10px;
  font-size: 14px;
  color: var(--ink-2);
}

.nav a {
  padding: 4px 0;
  border-bottom: 1.5px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.nav a:hover { color: var(--brand); border-bottom-color: var(--brand); }

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}

.ver { font-size: 12.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  padding: 12px 22px;
  cursor: pointer;
  transition: transform .16s var(--ease), background-color .18s ease,
    border-color .18s ease, box-shadow .18s ease, opacity .18s ease;
  white-space: nowrap;
}

.btn-sm { padding: 7px 15px; font-size: 13.5px; border-radius: 8px; }

.btn-primary {
  background: linear-gradient(180deg, #3a76f0, var(--brand));
  color: #fff;
  box-shadow: 0 8px 18px -10px rgba(37, 99, 235, .8);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #2f6ae6, var(--brand-deep));
  transform: translateY(-1px);
}

.btn-primary:disabled {
  background: #d7dfec;
  color: #8593a8;
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink-2);
  background: #fff;
}

.btn-ghost:hover { border-color: #c9d5e6; color: var(--ink); }

/* ---------------------------------------------------------- 首屏 */
.hero {
  padding: 64px 0 76px;
  background:
    radial-gradient(1000px 420px at 84% -10%, #edf3ff 0%, rgba(237, 243, 255, 0) 64%),
    var(--bg);
  border-bottom: 1px solid var(--line-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: 52px;
  align-items: start;
}

.eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.pill {
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--brand-deep);
  background: var(--brand-soft);
  border: 1px solid #d7e4fd;
  border-radius: 999px;
  padding: 2px 10px;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(32px, 3.6vw, 48px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -.02em;
}

.hero h1 .hl {
  color: var(--brand);
  background: linear-gradient(180deg, transparent 62%, var(--brand-soft) 62%);
  padding: 0 3px;
}

.lede {
  margin-top: 20px;
  font-size: 16px;
  color: var(--ink-2);
  max-width: 34em;
}

.lede b { color: var(--ink); }

.cta-row {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 20px;
  font-size: 13px;
  color: var(--ink-3);
}

.hero-chips li { position: relative; padding-left: 16px; }

.hero-chips li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ok);
  font-size: 12px;
  font-weight: 700;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.facts dt {
  font-size: 23px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

.facts dd { font-size: 12.5px; color: var(--ink-3); margin-top: 2px; }

/* ---------------------------------------------------------- 首屏演示面板 */
.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 30px 60px -44px rgba(15, 27, 45, .45);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line-soft);
  background: #fcfdff;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ink-2);
}

.panel-title b { color: var(--ink); font-variant-numeric: tabular-nums; }

.dot-live {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(14, 159, 110, .14);
}

.panel-tags { display: flex; gap: 6px; }

.tg {
  font-size: 11.5px;
  color: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 8px;
  white-space: nowrap;
}

.tg-ok { color: var(--ok); border-color: #c7ecdb; background: var(--ok-soft); }
.tg-warn { color: var(--warn); border-color: #f3d8c6; background: #fdf5ef; }

.panel-body { padding: 6px 0; }

.plist { display: block; }

.prow {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  grid-template-areas:
    "check name size"
    "check meta size";
  align-items: center;
  column-gap: 10px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color .15s ease;
}

.prow:last-child { border-bottom: none; }
.prow:hover { background: #fafcff; }
.prow.is-checked { background: #f5f9ff; }

.pcheck {
  grid-area: check;
  width: 18px;
  height: 18px;
  border: 1.5px solid #c6d2e4;
  border-radius: 5px;
  background: #fff;
  cursor: pointer;
  position: relative;
  transition: background-color .15s ease, border-color .15s ease;
}

.prow.is-checked .pcheck {
  background: var(--brand);
  border-color: var(--brand);
}

.prow.is-checked .pcheck::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(42deg);
}

.pcheck:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

.pname {
  grid-area: name;
  font-size: 14px;
  font-weight: 650;
  color: var(--ink);
}

.pmeta {
  grid-area: meta;
  font-size: 11.5px;
  color: var(--ink-3);
}

.psize {
  grid-area: size;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

.prow.is-checked .psize { color: var(--brand-deep); }

.panel-foot {
  border-top: 1px solid var(--line-soft);
  padding: 14px 18px 16px;
  background: #fbfdff;
  display: grid;
  gap: 10px;
}

.panel-total {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-2);
}

.panel-total b {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.link-btn {
  margin-left: auto;
  border: none;
  background: none;
  color: var(--brand);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}

.link-btn:hover { border-bottom-color: var(--brand); }

.panel-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.panel-hint { font-size: 11.5px; color: var(--ink-3); }

.panel-note {
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink-3);
  border-top: 1px dashed var(--line-soft);
  padding-top: 9px;
}

.btn-clean { margin-left: auto; padding: 9px 18px; font-size: 13.5px; border-radius: 9px; }

/* ---------------------------------------------------------- 通用区块 */
.section { padding: 78px 0; }

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.sec-head { max-width: 46em; margin-bottom: 40px; }

.sec-head .num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}

.sec-head h2 {
  font-size: clamp(24px, 2.5vw, 32px);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.3;
}

.sec-head p { margin-top: 12px; color: var(--ink-2); font-size: 15px; }

/* ---------------------------------------------------------- 问题共鸣 */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.problem-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  background: #fff;
  transition: border-color .18s ease, transform .18s var(--ease);
}

.problem-card:hover { border-color: #cfdcf0; transform: translateY(-2px); }

.prob-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-alt);
  font-size: 19px;
  margin-bottom: 14px;
}

.problem-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.problem-card p { font-size: 13.5px; color: var(--ink-2); }

/* ---------------------------------------------------------- 能力区块 */
.cap {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  gap: 40px;
  align-items: center;
  padding: 34px 0;
  border-top: 1px solid var(--line);
}

.cap:last-of-type { border-bottom: 1px solid var(--line); }

.cap-reverse .cap-copy { order: 2; }
.cap-reverse .cap-panel { order: 1; }

.cap-no {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: 7px;
  padding: 1px 9px;
  margin-bottom: 12px;
}

.cap h3 {
  font-size: clamp(19px, 1.9vw, 23px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin-bottom: 12px;
}

.cap-copy p { font-size: 15px; color: var(--ink-2); max-width: 38em; }

.cap-points {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.cap-points li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--ink-2);
}

.cap-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ok);
  font-size: 13px;
  font-weight: 700;
}

.cap-points b { color: var(--ink); }

.cap-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: 0 20px 40px -40px rgba(15, 27, 45, .5);
}

.section-alt .cap-panel { background: #fff; }

.mini-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 12.5px;
  color: var(--ink-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 4px;
}

.mini-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-2);
  padding: 8px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.mini-row b { font-variant-numeric: tabular-nums; color: var(--ink); }

.mini-foot {
  font-size: 11.5px;
  color: var(--ink-3);
  padding-top: 10px;
}

/* ---------------------------------------------------------- 其余功能 */
.extra { margin-top: 46px; }

.extra-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: .06em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}

.extra-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 40px;
}

.extra-grid li {
  display: grid;
  grid-template-columns: 8.2em minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13.5px;
  color: var(--ink-2);
}

.extra-grid b { font-weight: 650; color: var(--ink); }

/* ---------------------------------------------------------- 不碰什么 */
.guard-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.guard-col { padding: 26px 26px 6px 0; border-right: 1px solid var(--line-soft); }
.guard-col:last-child { border-right: none; padding-right: 0; }
.guard-col + .guard-col { padding-left: 26px; }

.guard-col h3 { font-size: 14.5px; font-weight: 700; margin-bottom: 14px; }

.guard-col ul { display: grid; gap: 9px; }

.guard-col li {
  font-size: 13.5px;
  color: var(--ink-2);
  padding-left: 14px;
  position: relative;
}

.guard-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .76em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #c9d5e6;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 34px;
  border-top: 1px solid var(--line);
  counter-reset: flow;
}

.flow li {
  padding: 24px 24px 4px 0;
  border-right: 1px solid var(--line-soft);
}

.flow li:last-child { border-right: none; padding-right: 0; }
.flow li + li { padding-left: 24px; }

.flow-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--brand-soft);
  color: var(--brand-deep);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
}

.flow li p { font-size: 13.5px; color: var(--ink-2); }

.move-notes {
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-2);
}

.move-notes b { color: var(--ink); }

/* ---------------------------------------------------------- 数字条 */
.stats {
  background: var(--ink);
  color: #fff;
  padding: 30px 0;
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.stats-inner div { display: grid; gap: 2px; }

.stats-inner b {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}

.stats-inner span { font-size: 12.5px; color: rgba(255, 255, 255, .66); }

/* ---------------------------------------------------------- 下载 */
.dl-card {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.dl-main { padding: 30px 32px; }

.dl-title {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

.dl-title strong { display: block; font-size: 19px; font-weight: 800; }
.dl-title span { font-size: 12.5px; color: var(--ink-3); }

.dl-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 22px;
  padding: 22px 0;
}

.dl-meta dt { font-size: 12px; color: var(--ink-3); margin-bottom: 2px; }
.dl-meta dd { font-size: 14px; color: var(--ink); font-variant-numeric: tabular-nums; }

.dl-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.dl-hint { font-size: 12.5px; color: var(--ink-3); }

.dl-side {
  background: var(--bg-alt);
  border-left: 1px solid var(--line-soft);
  padding: 30px 26px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.dl-side h3 { font-size: 13px; letter-spacing: .1em; color: var(--ink-3); font-weight: 700; }
.dl-side p { font-size: 13px; color: var(--ink-2); }

.plain-list { display: grid; gap: 9px; margin-top: 4px; }

.plain-list li {
  font-size: 13.5px;
  color: var(--ink-2);
  padding-left: 18px;
  position: relative;
}

.plain-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ok);
  font-size: 12px;
  font-weight: 700;
}

/* ---------------------------------------------------------- FAQ */
.faq { border-top: 1px solid var(--line); max-width: 54em; }
.faq details { border-bottom: 1px solid var(--line-soft); }

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 34px 18px 0;
  font-size: 15.5px;
  font-weight: 650;
  position: relative;
  transition: color .18s ease;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 19px;
  font-weight: 400;
  color: var(--ink-3);
}

.faq details[open] summary { color: var(--brand-deep); }
.faq details[open] summary::after { content: "–"; color: var(--brand); }

.faq details p {
  padding: 0 40px 20px 0;
  font-size: 14px;
  color: var(--ink-2);
}

/* ---------------------------------------------------------- 页脚 */
.footer {
  border-top: 1px solid var(--line);
  padding: 34px 0 54px;
  background: #fff;
}

.footer-inner { display: grid; gap: 8px; }

.footer-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 14.5px;
  margin-bottom: 6px;
}

.footer-ver { font-size: 12px; font-weight: 500; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.footer-note { font-size: 13px; color: var(--ink-3); }
.footer-note.dim { font-size: 12.5px; color: #94a3b8; }

/* ---------------------------------------------------------- 底部下载条 */
.floatbar {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translate(-50%, 16px);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 12px 10px 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(160%) blur(12px);
  box-shadow: 0 18px 40px -22px rgba(15, 27, 45, .45);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s var(--ease);
  max-width: calc(100vw - 32px);
}

.floatbar.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}

.floatbar-txt { display: grid; line-height: 1.35; }
.floatbar-txt b { font-size: 13.5px; }
.floatbar-txt span { font-size: 11.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; }

.floatbar-close {
  border: none;
  background: none;
  color: var(--ink-3);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 6px;
}

.floatbar-close:hover { background: var(--bg-alt); color: var(--ink); }

/* ---------------------------------------------------------- 进场 */
.js-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

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

/* ---------------------------------------------------------- 响应式 */
@media (max-width: 1040px) {
  .hero { padding: 52px 0 60px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 38px; }
  .panel { max-width: 560px; }
  .problem-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cap { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .cap-reverse .cap-copy, .cap-reverse .cap-panel { order: 0; }
  .extra-grid { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .guard-grid { grid-template-columns: minmax(0, 1fr); }
  .guard-col, .guard-col + .guard-col {
    padding: 22px 0;
    border-right: none;
    border-bottom: 1px solid var(--line-soft);
  }
  .guard-col:last-child { border-bottom: none; }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow li { border-bottom: 1px solid var(--line-soft); padding-bottom: 20px; }
  .flow li:nth-child(2) { border-right: none; padding-right: 0; }
  .flow li:nth-child(3) { padding-left: 0; }
  .stats-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dl-card { grid-template-columns: minmax(0, 1fr); }
  .dl-side { border-left: none; border-top: 1px solid var(--line-soft); }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 18px; }
  .topbar-inner { height: 58px; gap: 12px; }
  .nav { display: none; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .section { padding: 54px 0; }
  .problem-grid { grid-template-columns: minmax(0, 1fr); }
  .prow { padding: 10px 14px; }
  .extra-grid li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .dl-meta { grid-template-columns: minmax(0, 1fr); }
  .flow { grid-template-columns: minmax(0, 1fr); }
  .flow li + li { padding-left: 0; }
  .flow li:nth-child(2) { border-right: none; }
  .cta-row .btn { flex: 1 1 auto; }
  .panel-actions { flex-wrap: wrap; }
  .btn-clean { margin-left: 0; width: 100%; }
  .floatbar { left: 12px; right: 12px; transform: translateY(16px); bottom: 12px; }
  .floatbar.is-visible { transform: none; }
  .floatbar-txt { flex: 1; }
}

/* ---------------------------------------------------------- 减少动态效果 / 打印 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .js-reveal { opacity: 1; transform: none; }
}

@media print {
  .topbar, .floatbar { display: none; }
  .js-reveal { opacity: 1 !important; transform: none !important; }
  .faq details { break-inside: avoid; }
}