/* ============================================================
   DSHD 官网 · 小彩鲸 · 鲸彩世界
   ============================================================ */

:root {
  --bg-deep: #050816;
  --bg-soft: #0a0f2c;
  --blue: #4d6bfe;
  --violet: #7b61ff;
  --cyan: #22d3ee;
  --text: #eef1ff;
  --text-dim: rgba(238, 241, 255, 0.72);
  --text-faint: rgba(238, 241, 255, 0.5);
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.12);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-soft) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(77, 107, 254, 0.55); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--blue), var(--violet));
  border-radius: 8px;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; color: inherit; background: none; border: none; cursor: pointer; }
img { display: block; max-width: 100%; }
.hidden { display: none !important; }

/* ============ 导航栏 ============ */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(5, 8, 22, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-whale { width: 34px; height: auto; display: block; }
.logo-text { font-weight: 800; font-size: 1.25rem; letter-spacing: 0.04em; }

.logo-sub {
  margin-left: 8px;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(238, 241, 255, 0.62);
  white-space: nowrap;
}

@media (max-width: 720px) {
  .logo-sub { display: none; }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.25s;
}
.nav-link:hover { color: #fff; }

.lang-btn {
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  transition: all 0.25s;
}
.lang-btn:hover { border-color: var(--cyan); color: var(--cyan); }

.nav-btn {
  display: none;
  font-size: 1.5rem;
  line-height: 1;
  padding: 4px 10px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 999px;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.25s ease, box-shadow 0.25s ease,
    background 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}
.btn svg { width: 20px; height: 20px; flex-shrink: 0; }

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 8px 28px rgba(77, 107, 254, 0.35);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(122, 97, 255, 0.55);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  transform: translateY(-3px);
  border-color: rgba(34, 211, 238, 0.7);
  box-shadow: 0 10px 30px rgba(34, 211, 238, 0.2);
}

.btn-sm { padding: 9px 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

/* ============ Hero 首屏 ============ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; }

/* 极光光晕 */
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  animation: floatGlow 14s ease-in-out infinite alternate;
}
.glow-a {
  width: 46vw; height: 46vw;
  left: -10vw; top: -12vw;
  background: radial-gradient(circle, rgba(77, 107, 254, 0.55), transparent 65%);
}
.glow-b {
  width: 40vw; height: 40vw;
  right: -8vw; bottom: -10vw;
  background: radial-gradient(circle, rgba(124, 97, 255, 0.5), transparent 65%);
  animation-delay: -6s;
}

/* 气泡 */
.bubbles { position: absolute; inset: 0; pointer-events: none; }
.bubble {
  position: absolute;
  bottom: -30px;
  animation: rise var(--dur, 10s) linear var(--delay, 0s) infinite;
  will-change: transform;
}
.bubble-in {
  display: block;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.4);
  animation: sway 4s ease-in-out infinite alternate;
}

/* 小彩鲸 */
.swimmer {
  position: absolute;
  left: 0;
  z-index: 1;
  animation: swim var(--t, 30s) linear infinite;
  will-change: transform;
  pointer-events: none;
}
.s1 { bottom: 30%; --t: 26s; animation-delay: -6s; }
.s2 { bottom: 52%; --t: 44s; animation-delay: -18s; opacity: 0.55; }
.s3 { bottom: 16%; --t: 62s; animation-delay: -34s; opacity: 0.35; }

.bob {
  position: relative;
  animation: bob 3.4s ease-in-out infinite alternate;
}
.s2 .bob { animation-duration: 4.6s; }
.s3 .bob { animation-duration: 5.4s; }

.whale-svg { width: clamp(190px, 22vw, 300px); height: auto; display: block; }
.s2 .whale-svg { width: 170px; }
.s3 .whale-svg { width: 96px; }

/* 彩虹尾迹 */
.trail {
  position: absolute;
  right: 94%;
  top: 44%;
  width: 34vw;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(90deg, transparent, #ff6b6b, #ffd43b, #69db7c, #4dabf7, #9775fa);
  filter: blur(7px);
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 70%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 70%);
  animation: trailPulse 3.2s ease-in-out infinite alternate;
}

/* 尾鳍 / 喷水动画 */
.whale-fin {
  transform-box: fill-box;
  transform-origin: 100% 60%;
  animation: finFlap 1.6s ease-in-out infinite alternate;
}
.whale-spout circle {
  transform-box: fill-box;
  transform-origin: center;
  opacity: 0;
  animation: spout 2.4s ease-out infinite;
}
.whale-spout circle:nth-child(2) { animation-delay: 0.8s; }
.whale-spout circle:nth-child(3) { animation-delay: 1.6s; }

/* 波浪 */
.wave {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 110px;
  z-index: 1;
  background-repeat: repeat-x;
  background-size: 960px 110px;
  pointer-events: none;
  animation: waveShift 11s linear infinite;
}
.wave-a {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 960 110' preserveAspectRatio='none'%3E%3Cpath d='M0 55 Q120 8 240 55 T480 55 T720 55 T960 55 V110 H0 Z' fill='%234d6bfe' fill-opacity='0.30'/%3E%3C/svg%3E");
}
.wave-b {
  height: 150px;
  bottom: -24px;
  opacity: 0.65;
  animation-duration: 19s;
  animation-direction: reverse;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 960 110' preserveAspectRatio='none'%3E%3Cpath d='M0 55 Q120 8 240 55 T480 55 T720 55 T960 55 V110 H0 Z' fill='%2322d3ee' fill-opacity='0.16'/%3E%3C/svg%3E");
}

/* Hero 文案 */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 110px 24px 120px;
  max-width: 1100px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin-bottom: 26px;
}

.badge-whale {
  width: 22px;
  height: auto;
  display: block;
  animation: bob 3.2s ease-in-out infinite alternate;
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.grad-text {
  background: linear-gradient(90deg, #4d6bfe, #7b61ff, #22d3ee, #7b61ff, #4d6bfe);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: shimmer 7s linear infinite;
}

.title-sub {
  display: block;
  margin-top: 0.12em;
  font-size: 0.62em;
}

.tagline {
  margin-top: 22px;
  font-size: clamp(1.15rem, 2.6vw, 1.8rem);
  font-weight: 600;
  background: linear-gradient(90deg, #22d3ee, #7b61ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-sub {
  margin: 18px auto 0;
  max-width: 620px;
  color: var(--text-dim);
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  line-height: 1.75;
}

.hero-cta {
  margin-top: 38px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-meta {
  margin-top: 32px;
  margin-bottom: 18px;
  color: var(--text-faint);
  font-size: 0.88rem;
  letter-spacing: 0.06em;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255, 255, 255, 0.5);
  width: 26px;
  animation: hintBounce 2s ease-in-out infinite;
}
.scroll-hint svg { width: 100%; }

/* ============ 通用区块 ============ */
.section {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 110px 24px;
}

.section-alt::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(60% 60% at 50% 0%, rgba(77, 107, 254, 0.12), transparent 70%);
}

.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: 0.01em;
}
.section-head p {
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 1.05rem;
}

.section-note {
  margin-top: 34px;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.9rem;
}

/* ============ 卡片 ============ */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
}
.cards-three { max-width: 1100px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 34px 30px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(122, 97, 255, 0.6);
  box-shadow: 0 20px 60px rgba(77, 107, 254, 0.25);
}

.card h3 {
  margin-top: 18px;
  font-size: 1.3rem;
  font-weight: 700;
}

.card-desc {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.65;
}

.card-icon {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 8px 24px rgba(77, 107, 254, 0.4);
}
.card-icon svg { width: 28px; height: 28px; }
.icon-win { background: linear-gradient(135deg, #22d3ee, #4d6bfe); }
.icon-mac { background: linear-gradient(135deg, #a78bfa, #7b61ff); }
.icon-qq { background: linear-gradient(135deg, #4d6bfe, #22d3ee); }
.icon-wx { background: linear-gradient(135deg, #34d399, #22d3ee); }
.icon-mail { background: linear-gradient(135deg, #ffa94d, #ff6b6b); }

.card-meta {
  margin-top: 18px;
  list-style: none;
  width: 100%;
}
.card-meta li {
  padding: 5px 0;
  color: var(--text-dim);
  font-size: 0.93rem;
}
.card-meta b { color: var(--text); font-weight: 600; }

.card-steps {
  margin: 16px 0 24px;
  width: 100%;
  padding: 14px 0 0;
  border-top: 1px dashed rgba(255, 255, 255, 0.15);
  color: var(--text-faint);
  font-size: 0.9rem;
  line-height: 1.8;
  white-space: pre-line;
  text-align: left;
}

/* ============ GitHub 区 ============ */
.gh-wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: stretch;
  max-width: 1100px;
  margin: 0 auto;
}

.repo-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 38px 34px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.repo-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.55);
  box-shadow: 0 20px 60px rgba(34, 211, 238, 0.16);
}

.repo-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.repo-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
}
.repo-name svg { width: 30px; height: 30px; color: #eef1ff; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.9rem;
  color: var(--text-dim);
}
.pill svg { width: 16px; height: 16px; color: #ffd43b; }
.pill b { color: var(--text); font-weight: 700; }

.star-count.live {
  border-color: rgba(255, 212, 59, 0.55);
  box-shadow: 0 0 18px rgba(255, 212, 59, 0.25);
}
.star-count.live svg { animation: twinkle 1.6s ease-in-out infinite; }

.repo-desc { color: var(--text-dim); line-height: 1.7; }

.repo-url {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  padding: 8px 14px;
  border-radius: 10px;
  align-self: flex-start;
}

.repo-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.repo-badges span {
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 36px 32px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.steps li { display: flex; gap: 18px; align-items: flex-start; }
.step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 6px 20px rgba(77, 107, 254, 0.4);
}
.steps b { font-size: 1.05rem; display: block; margin-bottom: 4px; }
.steps p { color: var(--text-dim); font-size: 0.93rem; line-height: 1.6; }

/* ============ 社区 ============ */
.qr {
  margin: 20px auto 0;
  width: 200px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: #fff;
}
.qr img { width: 100%; height: auto; display: block; }

.qr-ph {
  width: 100%;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px;
  text-align: center;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.72rem;
  line-height: 1.5;
  white-space: pre-line;
  background: repeating-conic-gradient(rgba(255, 255, 255, 0.08) 0% 25%, transparent 0% 50%) 0 0 / 18px 18px;
}
.qr-ph svg { width: 34px; height: 34px; opacity: 0.7; }

.qq-num { margin-top: 16px; color: var(--text-dim); font-size: 0.92rem; }
.qq-num b { color: var(--text); font-weight: 700; }

.cards-three .card > .btn,
.cards-three .card > .repo-url { margin-top: 18px; }
.cards-three .card > .repo-url { align-self: center; }

/* ============ 页脚 ============ */
.footer {
  text-align: center;
  padding: 54px 24px 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-whale {
  width: 64px;
  height: auto;
  opacity: 0.8;
  margin: 0 auto;
  display: block;
  animation: bob 3.6s ease-in-out infinite alternate;
}

.footer-tag {
  margin-top: 14px;
  font-weight: 600;
  background: linear-gradient(90deg, #22d3ee, #7b61ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.footer-rights { margin-top: 10px; color: var(--text-faint); font-size: 0.88rem; }

.footer-links {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  gap: 22px;
  font-size: 0.92rem;
}
.footer-links a { color: var(--text-dim); transition: color 0.25s; }
.footer-links a:hover { color: #fff; }

/* ============ 滚动显现 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.revealed { opacity: 1; transform: none; }

.cards .reveal:nth-child(2) { transition-delay: 0.12s; }
.cards .reveal:nth-child(3) { transition-delay: 0.24s; }

/* ============ 动画 ============ */
@keyframes swim {
  from { transform: translateX(-340px); }
  to { transform: translateX(calc(100vw + 340px)); }
}

@keyframes bob {
  from { transform: translateY(0); }
  to { transform: translateY(-14px); }
}

@keyframes rise {
  from { transform: translateY(0); opacity: 0; }
  8% { opacity: 0.85; }
  to { transform: translateY(-110vh); opacity: 0; }
}

@keyframes sway {
  from { transform: translateX(-26px); }
  to { transform: translateX(26px); }
}

@keyframes finFlap {
  from { transform: rotate(-8deg); }
  to { transform: rotate(10deg); }
}

@keyframes spout {
  0% { transform: translateY(0) scale(1); opacity: 0.85; }
  100% { transform: translateY(-16px) scale(0.55); opacity: 0; }
}

@keyframes trailPulse {
  from { opacity: 0.35; }
  to { opacity: 0.75; }
}

@keyframes waveShift {
  to { background-position-x: -960px; }
}

@keyframes shimmer {
  to { background-position: -220% 0; }
}

@keyframes floatGlow {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(4vw, 3vh) scale(1.12); }
}

@keyframes hintBounce {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.55; }
  50% { transform: translate(-50%, 8px); opacity: 1; }
}

@keyframes twinkle {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.25) rotate(8deg); }
}

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .gh-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .nav-btn { display: block; }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 18px 24px 24px;
    background: rgba(5, 8, 22, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.32s ease, opacity 0.32s ease;
    z-index: 49;
  }
  body.nav-open .nav-links { transform: none; opacity: 1; }
  body.nav-open .nav-btn { color: var(--cyan); }

  .nav-links .nav-link,
  .nav-links .lang-btn,
  .nav-links .btn {
    padding: 12px 16px;
    border-radius: 12px;
    text-align: center;
  }
  .nav-links .lang-btn { border: 1px solid rgba(255, 255, 255, 0.25); }
}

@media (max-width: 560px) {
  .hero-cta .btn { flex: 1 1 100%; }
  .section { padding: 84px 20px; }
  .card { padding: 28px 22px; }
  .trail { width: 46vw; }
}

/* ============ Hero App 窗口主图 ============ */
.hero-app {
  margin: 46px auto 0;
  width: min(880px, 92vw);
}

.app-frame {
  position: relative;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(10, 15, 44, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 70px rgba(77, 107, 254, 0.2);
  overflow: hidden;
  transform: perspective(1200px) rotateX(5deg);
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}
.app-frame:hover {
  transform: perspective(1200px) rotateX(0deg);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.6), 0 0 90px rgba(122, 97, 255, 0.32);
}
.app-frame img { width: 100%; height: auto; display: block; }

.app-bar {
  display: flex;
  gap: 7px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}
.app-bar .dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }

/* ============ 界面预览 · 轮播 ============ */
.carousel {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
}

.carousel-track {
  display: flex;
  transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide {
  flex: 0 0 100%;
  position: relative;
  margin: 0;
  cursor: zoom-in;
}
.slide img { width: 100%; height: auto; display: block; }

.slide-cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 18px 14px;
  background: linear-gradient(transparent, rgba(5, 8, 22, 0.88));
  color: #fff;
  font-size: 0.95rem;
  font-weight: 500;
}

.car-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 1.7rem;
  line-height: 1;
  display: grid;
  place-items: center;
  color: var(--text-dim);
  background: rgba(10, 15, 44, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: color 0.25s, border-color 0.25s, background 0.25s;
  z-index: 2;
}
.car-btn:hover {
  color: #fff;
  border-color: var(--cyan);
  background: rgba(10, 15, 44, 0.8);
}
.car-prev { left: 14px; }
.car-next { right: 14px; }

.car-dots {
  display: flex;
  justify-content: center;
  gap: 9px;
  margin-top: 20px;
}
.car-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.25);
  padding: 0;
  transition: width 0.3s ease, background 0.3s ease;
}
.car-dot.active {
  width: 24px;
  background: linear-gradient(90deg, var(--blue), var(--violet));
}

.shots-hint {
  margin-top: 22px;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.88rem;
}

/* ============ Lightbox 大图 ============ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(3, 5, 15, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.lightbox.open { display: flex; }

.lb-body {
  margin: 0;
  max-width: min(1400px, 92vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.lb-body img {
  max-width: 100%;
  max-height: 80vh;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
}
.lb-body figcaption { color: var(--text-dim); font-size: 0.95rem; }

.lb-close {
  position: absolute;
  top: 18px;
  right: 22px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.2rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: color 0.25s, border-color 0.25s;
}
.lb-close:hover { color: #fff; border-color: var(--cyan); }

.lb-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  font-size: 1.8rem;
  line-height: 1;
  display: grid;
  place-items: center;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: color 0.25s, border-color 0.25s;
}
.lb-nav:hover { color: #fff; border-color: var(--cyan); }
.lb-prev { left: 20px; }
.lb-next { right: 20px; }

@media (max-width: 640px) {
  .car-btn { width: 38px; height: 38px; font-size: 1.3rem; }
  .car-prev { left: 8px; }
  .car-next { right: 8px; }
}

@media (max-width: 640px) {
  .lb-nav { width: 40px; height: 40px; font-size: 1.4rem; }
  .lb-prev { left: 8px; }
  .lb-next { right: 8px; }
  .lb-body { max-width: 96vw; }
}