/* ==========================================================================
   溏心vlog · 官方发布页
   视觉：奶油纸 / 梅子紫 / 珊瑚红 / 竖屏生活切片
   ========================================================================== */

:root {
  --paper: #fff8f0;
  --paper-2: #f9ede1;
  --paper-3: #f3ddcc;
  --ink: #24151c;
  --plum: #5b1e38;
  --plum-deep: #351021;
  --coral: #f45b69;
  --coral-2: #ff7a72;
  --peach: #efa36c;
  --muted: #7c6a63;
  --muted-2: #a28d84;
  --line: #e7d3c5;
  --line-dark: rgba(255, 248, 240, 0.18);
  --cream: #fff8f0;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", Georgia, serif;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
  --max: 1160px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

::selection {
  background: var(--coral);
  color: var(--cream);
}

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--plum);
  color: var(--cream);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

/* ============================ 页头 ============================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 248, 240, 0.9);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.25s ease, background-color 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 248, 240, 0.98);
  box-shadow: 0 16px 36px -32px rgba(36, 21, 28, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
}

.brand-word {
  display: flex;
  flex-direction: column;
  font-size: 19px;
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.brand-word small {
  margin-top: 3px;
  font-family: var(--mono);
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--coral);
}

.nav {
  display: flex;
  gap: 24px;
  margin-left: auto;
}

.nav a {
  position: relative;
  padding: 5px 0;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--coral);
  transition: right 0.24s ease;
}

.nav a:hover {
  color: var(--ink);
}

.nav a:hover::after {
  right: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border: 1.5px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.2s ease,
    background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
}

.btn--coral {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
}

.btn--coral:hover {
  transform: translateY(-2px);
  background: var(--coral-2);
  border-color: var(--coral-2);
  box-shadow: 0 14px 28px -16px rgba(244, 91, 105, 0.55);
}

.btn--outline {
  border-color: rgba(36, 21, 28, 0.26);
  color: var(--ink);
}

.btn--outline:hover {
  transform: translateY(-2px);
  border-color: var(--coral);
  color: var(--coral);
}

.btn--cream {
  background: var(--cream);
  border-color: var(--cream);
  color: var(--plum);
}

.btn--cream:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -18px rgba(0, 0, 0, 0.35);
}

.btn--sm {
  padding: 10px 17px;
  font-size: 12.5px;
}

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(36, 21, 28, 0.22);
  border-radius: 10px;
}

.menu-btn span {
  position: relative;
  width: 18px;
  height: 1.7px;
  background: var(--ink);
  border-radius: 2px;
}

.menu-btn span::before,
.menu-btn span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.7px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.22s ease;
}

.menu-btn span::before {
  top: -6px;
}

.menu-btn span::after {
  top: 6px;
}

.menu-btn[aria-expanded="true"] span {
  background: transparent;
}

.menu-btn[aria-expanded="true"] span::before {
  transform: translateY(6px) rotate(45deg);
}

.menu-btn[aria-expanded="true"] span::after {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 76px 0 auto;
  z-index: 95;
  padding: 12px 24px 24px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 24px 50px -32px rgba(36, 21, 28, 0.5);
}

.mobile-menu.is-open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  font-weight: 600;
}

.mobile-menu .btn {
  margin-top: 16px;
  border-bottom: 0;
}

/* ============================ 首屏 ============================ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 74px 0 78px;
  background:
    radial-gradient(circle at 88% 12%, rgba(244, 91, 105, 0.12), transparent 36%),
    radial-gradient(circle at 6% 92%, rgba(239, 163, 108, 0.13), transparent 38%),
    var(--paper);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(91, 30, 56, 0.14) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(ellipse 60% 55% at 76% 36%, #000, transparent 76%);
  mask-image: radial-gradient(ellipse 60% 55% at 76% 36%, #000, transparent 76%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.03fr 0.97fr;
  gap: 40px;
  align-items: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--coral);
}

.kicker::before {
  content: "";
  width: 24px;
  height: 1.5px;
  background: var(--coral);
}

.hero h1 {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-size: clamp(46px, 6.2vw, 86px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.06em;
}

.hero h1 em {
  display: inline-block;
  font-style: normal;
  color: var(--coral);
}

.hero-lead {
  max-width: 33em;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 20px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.hero-meta li {
  padding: 0 18px;
  border-left: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.45;
  color: var(--muted);
}

.hero-meta li:first-child {
  padding-left: 0;
  border-left: 0;
}

.hero-meta b {
  display: block;
  margin-bottom: 3px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--plum);
}

/* 首屏图片框：缺图时留白，不显示占位符 */
.hero-stage {
  position: relative;
  height: 550px;
}

.stage-label {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--muted-2);
  white-space: nowrap;
}

.frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, #f4ddce, #efd0c0);
  border: 6px solid #fffdf8;
  border-radius: 12px;
  box-shadow: 0 26px 54px -30px rgba(53, 16, 33, 0.55);
}

.frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 1;
}

.frame img.is-loaded {
  opacity: 1;
}

.hero-main {
  position: absolute;
  top: 44px;
  left: 50%;
  z-index: 3;
  width: min(256px, 56%);
  aspect-ratio: 3 / 4.3;
  transform: translateX(-50%) rotate(-2deg);
}

.hero-left {
  position: absolute;
  top: 122px;
  left: 0;
  z-index: 1;
  width: 158px;
  aspect-ratio: 3 / 4.2;
  transform: rotate(-10deg);
}

.hero-right {
  position: absolute;
  top: 142px;
  right: 0;
  z-index: 2;
  width: 150px;
  aspect-ratio: 3 / 4.2;
  transform: rotate(9deg);
}

.hero-main .caption,
.hero-left .caption,
.hero-right .caption {
  position: absolute;
  left: 10px;
  bottom: 9px;
  z-index: 3;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(36, 21, 28, 0.78);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.stage-stamp {
  position: absolute;
  right: 1%;
  bottom: 18px;
  z-index: 6;
  display: grid;
  place-items: center;
  width: 94px;
  height: 94px;
  border: 1px solid var(--plum);
  border-radius: 50%;
  background: var(--cream);
  color: var(--plum);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-align: center;
  transform: rotate(8deg);
  box-shadow: 4px 4px 0 var(--plum);
}

.stage-stamp b {
  display: block;
  font-family: var(--serif);
  font-size: 27px;
  line-height: 1;
}

/* ============================ 通用区块 ============================ */
.section {
  position: relative;
  padding: 76px 0;
}

.section--tint {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 38px;
}

.section-head > div {
  max-width: 720px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral);
}

.section-label::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--coral);
  transform: rotate(45deg);
}

.section-label span {
  color: var(--muted-2);
  letter-spacing: 0.06em;
}

.section h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(30px, 3.7vw, 46px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.045em;
}

.section h2 em {
  font-style: normal;
  color: var(--coral);
}

.section-head > p {
  max-width: 300px;
  margin: 0 0 4px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ============================ 01 今日切片 ============================ */
.clip-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.clip-card {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffdf8;
  box-shadow: 0 16px 34px -30px rgba(53, 16, 33, 0.5);
  transition: transform 0.25s ease, border-color 0.25s ease,
    box-shadow 0.25s ease;
}

.clip-card:hover {
  transform: translateY(-5px);
  border-color: rgba(244, 91, 105, 0.45);
  box-shadow: 0 24px 42px -28px rgba(53, 16, 33, 0.4);
}

.clip-frame {
  aspect-ratio: 4 / 5;
  margin: 9px 9px 0;
  border-radius: 9px;
}

.clip-frame .time {
  position: absolute;
  top: 9px;
  left: 9px;
  z-index: 3;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--plum);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.05em;
}

.clip-body {
  padding: 14px 17px 17px;
}

.clip-body h3 {
  margin: 0 0 5px;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.clip-body p {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ============================ 02 剪辑台 ============================ */
.editor {
  background: var(--plum);
  color: var(--cream);
}

.editor .section-label {
  color: #ffb8ac;
}

.editor .section-label::before {
  background: #ffb8ac;
}

.editor .section-label span {
  color: rgba(255, 248, 240, 0.45);
}

.editor h2 {
  color: var(--cream);
}

.editor h2 em {
  color: #ffb8ac;
}

.editor .section-head > p {
  color: rgba(255, 248, 240, 0.55);
}

.editor-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.timeline {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid rgba(255, 248, 240, 0.18);
  border-radius: 16px;
  background: rgba(255, 248, 240, 0.06);
}

.timeline-top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.08em;
  color: rgba(255, 248, 240, 0.5);
}

.timeline-preview {
  position: relative;
  height: 128px;
  overflow: hidden;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(244, 91, 105, 0.3), transparent 55%),
    linear-gradient(315deg, rgba(239, 163, 108, 0.3), transparent 55%),
    #2b0c1b;
}

.timeline-preview::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 248, 240, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 248, 240, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
}

.timeline-play {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--cream);
  color: var(--plum);
  transform: translate(-50%, -50%);
}

.timeline-play svg {
  width: 15px;
  height: 15px;
  margin-left: 2px;
}

.timeline-tracks {
  display: grid;
  gap: 7px;
  margin-top: 14px;
}

.track {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 8px;
  align-items: center;
  font-family: var(--mono);
  font-size: 8px;
  color: rgba(255, 248, 240, 0.48);
}

.track-bar {
  position: relative;
  height: 22px;
  overflow: hidden;
  border-radius: 4px;
  background: rgba(255, 248, 240, 0.08);
}

.track-bar span {
  position: absolute;
  top: 3px;
  bottom: 3px;
  border-radius: 3px;
  background: rgba(255, 248, 240, 0.22);
}

.track-bar span:nth-child(2) {
  background: rgba(244, 91, 105, 0.58);
}

.track-bar span:nth-child(3) {
  background: rgba(239, 163, 108, 0.5);
}

.timeline-playhead {
  position: absolute;
  top: 44px;
  bottom: 20px;
  left: 57%;
  width: 1px;
  background: var(--coral-2);
}

.timeline-playhead::before {
  content: "";
  position: absolute;
  top: -4px;
  left: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--coral-2);
}

.tool-list {
  display: grid;
  gap: 0;
}

.tool {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  padding: 15px 0;
  border-top: 1px solid var(--line-dark);
}

.tool:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.tool span {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 9px;
  color: #ffb8ac;
}

.tool h3 {
  margin: 0 0 3px;
  font-size: 15px;
  font-weight: 700;
}

.tool p {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(255, 248, 240, 0.58);
}

/* ============================ 03 拍摄清单 ============================ */
.prompt-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.prompt-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 22px;
  align-items: baseline;
  padding: 19px 0;
  border-bottom: 1px solid var(--line);
}

.prompt-day {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--coral);
}

.prompt-title {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.prompt-note {
  font-size: 12px;
  color: var(--muted);
}

/* ============================ 04 拍的人说 ============================ */
.quote-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.quote {
  margin: 0;
  padding: 24px 22px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffdf8;
}

.quote::before {
  content: "“";
  display: block;
  margin-bottom: 4px;
  font-family: var(--serif);
  font-size: 42px;
  line-height: 0.8;
  color: var(--coral);
}

.quote p {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
}

.quote footer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.quote-avatar {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--plum);
  color: var(--cream);
  font-size: 11px;
  font-weight: 700;
}

.quote cite {
  font-style: normal;
  font-size: 11.5px;
  font-weight: 600;
}

.quote cite span {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 400;
  color: var(--muted-2);
}

/* ============================ 05 下载 ============================ */
.download {
  background: var(--coral);
  color: #fff;
  padding: 60px 0;
}

.download-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.download .kicker {
  color: #ffe3df;
}

.download .kicker::before {
  background: #ffe3df;
}

.download h2 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.download p {
  margin: 0 0 22px;
  max-width: 34em;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.download-fine {
  margin: 16px 0 0;
  font-family: var(--mono);
  font-size: 9px;
  color: rgba(255, 255, 255, 0.55);
}

.device-card {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 16px;
  background: rgba(53, 16, 33, 0.14);
}

.device-card h3 {
  margin: 0 0 13px;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: #ffe3df;
}

.device-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.17);
  font-size: 12px;
}

.device-row:first-of-type {
  border-top: 0;
}

.device-row strong {
  font-size: 13px;
}

.device-row span {
  font-family: var(--mono);
  font-size: 9px;
  color: rgba(255, 255, 255, 0.6);
}

/* ============================ 06 FAQ ============================ */
.faq-grid {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 46px;
  align-items: start;
}

.faq-intro .section-head {
  display: block;
  margin-bottom: 22px;
}

.faq-intro h2 {
  margin-bottom: 12px;
}

.faq-intro p {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
}

.faq-note {
  margin-top: 22px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fffdf8;
  font-size: 12px;
  line-height: 1.8;
  color: var(--muted);
}

.faq-note b {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
}

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

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 18px 2px;
  text-align: left;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
}

.faq-q:hover {
  color: var(--coral);
}

.faq-icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  background: var(--coral);
  transform: translate(-50%, -50%);
  transition: transform 0.25s ease;
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.is-open .faq-icon {
  background: var(--coral);
  border-color: var(--coral);
}

.faq-item.is-open .faq-icon::before,
.faq-item.is-open .faq-icon::after {
  background: #fff;
}

.faq-item.is-open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.faq-item.is-open .faq-a {
  grid-template-rows: 1fr;
}

.faq-a-inner {
  overflow: hidden;
}

.faq-a-inner p {
  margin: 0;
  padding: 0 46px 18px 2px;
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ============================ 页脚 ============================ */
.site-footer {
  background: var(--plum-deep);
  color: rgba(255, 248, 240, 0.6);
  padding: 48px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  gap: 36px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
}

.footer-brand span {
  font-size: 18px;
  font-weight: 800;
  color: var(--cream);
}

.footer-brand small {
  display: block;
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.18em;
  color: #ffb8ac;
}

.footer-brand p {
  margin: 0;
  max-width: 34em;
  font-size: 11.5px;
  line-height: 1.8;
  color: rgba(255, 248, 240, 0.46);
}

.footer-col h3 {
  margin: 2px 0 12px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: rgba(255, 248, 240, 0.35);
}

.footer-col a {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  color: rgba(255, 248, 240, 0.66);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: #ffb8ac;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 248, 240, 0.12);
  font-family: var(--mono);
  font-size: 9.5px;
  color: rgba(255, 248, 240, 0.3);
}

/* ============================ 动效 ============================ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

/* ============================ 响应式 ============================ */
@media (max-width: 1050px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-stage {
    width: 100%;
    max-width: 600px;
    height: 520px;
    margin-inline: auto;
  }

  .clip-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .editor-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .download-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .faq-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }
}

@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .menu-btn {
    display: inline-flex;
  }

  .hero {
    padding: 52px 0 60px;
  }

  .hero h1 {
    font-size: clamp(42px, 10vw, 62px);
  }

  .section {
    padding: 58px 0;
  }

  .quote-grid {
    grid-template-columns: 1fr;
  }

  .prompt-row {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 6px 16px;
  }

  .prompt-note {
    grid-column: 2;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .container {
    width: calc(100% - 32px);
  }

  .header-inner {
    height: 68px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .brand-word {
    font-size: 17px;
  }

  .hero-stage {
    height: 440px;
  }

  .hero-main {
    width: 200px;
    top: 38px;
  }

  .hero-left {
    width: 112px;
    top: 92px;
  }

  .hero-right {
    width: 108px;
    top: 108px;
  }

  .stage-stamp {
    width: 76px;
    height: 76px;
    font-size: 7px;
  }

  .stage-stamp b {
    font-size: 21px;
  }

  .hero-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 0;
  }

  .hero-meta li {
    padding: 0 12px;
  }

  .hero-meta li:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .clip-grid {
    grid-template-columns: 1fr;
  }

  .clip-frame {
    aspect-ratio: 4 / 5;
  }

  .section-head {
    display: block;
    margin-bottom: 26px;
  }

  .section-head > p {
    margin-top: 8px;
    max-width: none;
  }

  .prompt-title {
    font-size: 18px;
  }

  .download-actions .btn {
    flex: 1 1 100%;
  }

  .device-card {
    padding: 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}