/* ---------- 主题变量 ---------- */
:root,
html[data-theme="light"] {
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --bg-elevated: #ffffff;
  --text-0: #0d1628;
  --text-1: #3c4a61;
  --text-2: #5d6b81;
  --text-3: #8b97ab;
  --line: #e7ebf3;
  --line-strong: #d8dfec;
  --brand: #4f7df0;
  --brand-strong: #3766dc;
  --brand-soft: #edf3ff;
  --brand-wash: #f4f8ff;
  --shadow-card: 0 1px 2px rgba(26, 46, 94, 0.04), 0 12px 32px -18px rgba(26, 46, 94, 0.18);
  --shadow-card-hover: 0 2px 4px rgba(26, 46, 94, 0.05), 0 18px 44px -20px rgba(38, 72, 150, 0.28);
  --header-bg: rgba(255, 255, 255, 0.88);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0a0f18;
  --bg-soft: #0e1521;
  --bg-elevated: #111a28;
  --text-0: #edf2fb;
  --text-1: #c3cfdf;
  --text-2: #96a4b9;
  --text-3: #6d7c92;
  --line: #1c2635;
  --line-strong: #263243;
  --brand: #7ba1ff;
  --brand-strong: #9cbaff;
  --brand-soft: #17233a;
  --brand-wash: #131d2e;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.3), 0 16px 36px -22px rgba(0, 0, 0, 0.8);
  --shadow-card-hover: 0 2px 6px rgba(0, 0, 0, 0.35), 0 22px 48px -22px rgba(0, 0, 0, 0.9);
  --header-bg: rgba(10, 15, 24, 0.88);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-1);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, ul, ol {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

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

button {
  font: inherit;
  color: inherit;
}

::selection {
  background: rgba(79, 125, 240, 0.22);
}

.container {
  width: min(1140px, 100% - 48px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: -48px;
  left: 16px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--text-0);
  color: var(--bg);
  font-size: 13px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
}

.btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(180deg, #5c8bf6, #4173e8);
  border-color: rgba(43, 84, 190, 0.5);
  box-shadow: 0 1px 2px rgba(20, 45, 110, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #5284f5, #3767dd);
  box-shadow: 0 2px 6px rgba(20, 45, 110, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.btn-ghost {
  color: var(--text-1);
  background: var(--bg-elevated);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card);
}

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

.btn-sm {
  height: 32px;
  padding: 0 13px;
  font-size: 12.5px;
  border-radius: 8px;
}

.btn-lg {
  height: 46px;
  padding: 0 24px;
  font-size: 14.5px;
  border-radius: 12px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  border-bottom: 1px solid transparent;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px -20px rgba(20, 40, 90, 0.35);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

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

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.brand-name {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-0);
}

.brand-name em {
  font-style: normal;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: 12px;
  font-size: 13.5px;
}

.nav-links a {
  color: var(--text-2);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--text-0);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover {
  background: var(--bg-soft);
  color: var(--text-0);
}

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

.icon-sun {
  display: none;
}

html[data-theme="dark"] .icon-sun {
  display: block;
}

html[data-theme="dark"] .icon-moon {
  display: none;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 88px 0 88px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: -120px 0 auto;
  height: 880px;
  pointer-events: none;
  background:
    radial-gradient(640px 420px at 22% 6%, rgba(94, 140, 255, 0.16), transparent 70%),
    radial-gradient(560px 380px at 82% 18%, rgba(143, 179, 255, 0.18), transparent 70%),
    radial-gradient(700px 420px at 50% 78%, rgba(79, 125, 240, 0.07), transparent 72%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(90, 120, 180, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(90, 120, 180, 0.07) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 62% 52% at 50% 26%, #000 20%, transparent 72%);
  mask-image: radial-gradient(ellipse 62% 52% at 50% 26%, #000 20%, transparent 72%);
}

html[data-theme="dark"] .hero-bg {
  background:
    radial-gradient(640px 420px at 22% 6%, rgba(72, 116, 240, 0.2), transparent 70%),
    radial-gradient(560px 380px at 82% 18%, rgba(110, 155, 255, 0.12), transparent 70%),
    radial-gradient(700px 420px at 50% 78%, rgba(60, 100, 220, 0.1), transparent 72%);
}

.hero-inner {
  position: relative;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-card);
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 0.01em;
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38c08a;
  box-shadow: 0 0 0 3px rgba(56, 192, 138, 0.16);
}

.hero h1 {
  margin: 26px auto 0;
  max-width: 900px;
  font-size: clamp(2.35rem, 5.1vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--text-0);
}

.grad {
  background: linear-gradient(96deg, #2f5fd6 8%, #6d9bff 62%, #8bb5ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

html[data-theme="dark"] .grad {
  background: linear-gradient(96deg, #9dbcff 8%, #6f9bff 58%, #b8d0ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-sub {
  margin: 22px auto 0;
  max-width: 660px;
  font-size: clamp(14.5px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--text-2);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px 12px;
  margin-top: 26px;
}

.hero-points li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-card);
  font-size: 12.5px;
  color: var(--text-1);
  white-space: nowrap;
}

.hero-points svg {
  flex-shrink: 0;
  color: var(--brand);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-3);
}

.meta-divider {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-3);
  opacity: 0.55;
}

/* ---------- 应用界面示意 ---------- */
.app-mock {
  position: relative;
  max-width: 1040px;
  margin: 68px auto 0;
  text-align: left;
}

.mock-window {
  position: relative;
  overflow: hidden;
  border: 1px solid #e4eaf5;
  border-radius: 16px;
  background: #ffffff;
  box-shadow:
    0 2px 6px rgba(24, 46, 96, 0.06),
    0 40px 90px -32px rgba(28, 58, 130, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.5) inset;
  color: #1b2537;
}

html[data-theme="dark"] .mock-window {
  border-color: #26324a;
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.4),
    0 50px 110px -30px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(120, 160, 255, 0.08) inset;
}

.mock-titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 14px;
  border-bottom: 1px solid #f0f3f9;
  background: #fbfcfe;
}

html[data-theme="dark"] .mock-titlebar {
  border-bottom-color: #1e2838;
  background: #121b29;
}

.traffic {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.traffic.red { background: #ff5f57; }
.traffic.yellow { background: #febc2e; }
.traffic.green { background: #28c840; }

.mock-appname {
  margin-left: auto;
  margin-right: auto;
  padding-left: 42px;
  font-size: 11px;
  color: #8e9bb0;
  letter-spacing: 0.02em;
}

html[data-theme="dark"] .mock-appname {
  color: #6e7d93;
}

.mock-content {
  padding: 18px 20px 22px;
}

html[data-theme="dark"] .mock-content {
  background: #0d1520;
}

.mock-top {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 30px;
}

.mock-top-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mock-top-left img {
  height: 17px;
  width: auto;
}

.mock-logo-dark {
  display: none;
}

html[data-theme="dark"] .mock-logo-light {
  display: none;
}

html[data-theme="dark"] .mock-logo-dark {
  display: block;
}

.mock-top-right {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #a3aebe;
}

.mock-version {
  font-size: 11px;
}

html[data-theme="dark"] .mock-version {
  color: #7c8ba1;
}

.kbd {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  height: 19px;
  padding: 0 6px;
  border: 1px solid #e8edf6;
  border-bottom-color: #dbe3f1;
  border-radius: 5px;
  background: #f8fafd;
  font-size: 9.5px;
  line-height: 1;
  color: #8493a9;
  letter-spacing: 0.04em;
}

html[data-theme="dark"] .kbd {
  border-color: #263246;
  border-bottom-color: #2f3c53;
  background: #16202f;
  color: #7f8fa5;
}

.mock-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.94fr 1.06fr;
  gap: 24px;
  margin-top: 20px;
}

.mock-col-head {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  font-weight: 600;
  color: #3a475e;
}

html[data-theme="dark"] .mock-col-head {
  color: #c4d0e2;
}

.mock-col-head svg {
  color: #6f86ad;
}

html[data-theme="dark"] .mock-col-head svg {
  color: #7d93b7;
}

.mock-col-head .kbd {
  margin-left: 1px;
}

.mock-list {
  margin-top: 10px;
  overflow: hidden;
  border: 1px solid #edf1f8;
  border-radius: 11px;
  background: #ffffff;
}

html[data-theme="dark"] .mock-list {
  border-color: #1d2839;
  background: #0b1320;
}

.mock-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 37px;
  padding: 0 11px;
  border-bottom: 1px solid #f2f5fa;
  font-size: 12px;
  color: #2c3a52;
  white-space: nowrap;
  overflow: hidden;
}

.mock-list li:nth-child(even) {
  background: #fafbfe;
}

html[data-theme="dark"] .mock-list li {
  border-bottom-color: #16202f;
  color: #b4c1d4;
}

html[data-theme="dark"] .mock-list li:nth-child(even) {
  background: #0e1725;
}

.mock-list li:last-child {
  border-bottom: 0;
}

.mock-list li span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.tick {
  position: relative;
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  border: 1.5px solid #ccd7e9;
  border-radius: 50%;
}

html[data-theme="dark"] .tick {
  border-color: #35445c;
}

.mock-list li.done {
  color: #a5b0c1;
  text-decoration: line-through;
}

html[data-theme="dark"] .mock-list li.done {
  color: #61708a;
}

.mock-list li.done .tick {
  border-color: #5b8bea;
  background: #5b8bea;
}

.mock-list li.done .tick::after {
  content: "";
  position: absolute;
  left: 3.5px;
  top: 1px;
  width: 3px;
  height: 6.5px;
  border: solid #fff;
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(42deg);
}

.mock-list li.mock-list-empty {
  color: #aeb9ca;
  background: #fcfdff;
}

html[data-theme="dark"] .mock-list li.mock-list-empty {
  color: #5f6e86;
  background: #0b1320;
}

.mock-countdown {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  margin-top: 14px;
  padding: 0 11px;
  overflow: hidden;
  border: 2px solid #cfe0ff;
  border-radius: 10px;
  font-size: 11.5px;
  color: #2c3a52;
}

html[data-theme="dark"] .mock-countdown {
  border-color: #2e4a7c;
  color: #c8d6ea;
}

.mock-countdown-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 41%;
  background: linear-gradient(90deg, #c8dcff, #7ea6ff);
  opacity: 0.9;
}

html[data-theme="dark"] .mock-countdown-fill {
  background: linear-gradient(90deg, #1d3560, #2f5da5);
  opacity: 0.85;
}

.mock-countdown-label,
.mock-countdown-time {
  position: relative;
}

.mock-countdown-time {
  margin-left: auto;
  font-size: 10.5px;
  color: #4e6ea8;
}

html[data-theme="dark"] .mock-countdown-time {
  color: #8fb2e8;
}

.mock-stickies {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.mock-sticky-card {
  padding: 9px 10px;
  border: 1px solid rgba(30, 50, 90, 0.06);
  border-radius: 9px;
  font-size: 10.5px;
  line-height: 1.45;
  color: #5c6575;
}

.mock-sticky-card b {
  display: block;
  margin-bottom: 2px;
  font-size: 11px;
  font-weight: 600;
  color: #333d4f;
}

.mock-sticky-card span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-sticky-card small {
  display: block;
  margin-top: 5px;
  font-size: 9px;
  color: rgba(70, 85, 110, 0.55);
}

html[data-theme="dark"] .mock-sticky-card {
  border-color: rgba(255, 255, 255, 0.05);
  color: #4d5666;
}

.is-yellow { background: #fff5cc; }
.is-mint { background: #dff6ee; }
.is-pink { background: #ffe6ee; }

html[data-theme="dark"] .is-yellow { background: #4a411f; color: #d9cd9c; }
html[data-theme="dark"] .is-mint { background: #204038; color: #a9d8c9; }
html[data-theme="dark"] .is-pink { background: #452632; color: #e2b6c4; }
html[data-theme="dark"] .mock-sticky-card b { color: #f0e6c8; }

.mock-float {
  position: absolute;
  right: -28px;
  bottom: -70px;
  width: 226px;
  padding: 11px 12px 10px;
  border: 1px solid #f0e3b8;
  border-radius: 11px;
  background: #fff9e3;
  box-shadow: 0 18px 40px -18px rgba(80, 60, 20, 0.45);
  rotate: 1.4deg;
  font-size: 11px;
  line-height: 1.55;
  color: #6a6047;
  transition: transform 0.3s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.3s ease;
  animation: mock-float-sway 8s ease-in-out infinite;
}

html[data-theme="dark"] .mock-float {
  border-color: #4a411f;
  background: #2d2717;
  color: #c9bd99;
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.8);
}

.mock-float-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 5px;
  font-size: 11.5px;
  font-weight: 600;
  color: #4d4530;
}

html[data-theme="dark"] .mock-float-head {
  color: #eee2bd;
}

.mock-float-close {
  font-size: 13px;
  line-height: 1;
  color: #b4a884;
}

.mock-float-foot {
  margin-top: 8px;
  font-size: 9px;
  color: #b3a882;
}

/* 示意图动效与 hover */
.mock-window {
  transition: transform 0.35s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.35s ease, border-color 0.35s ease;
  animation: mock-window-float 10s ease-in-out infinite;
}

.mock-window:hover {
  transform: translateY(-6px);
  border-color: #cfdcf3;
  box-shadow:
    0 3px 8px rgba(24, 46, 96, 0.07),
    0 52px 104px -32px rgba(28, 58, 130, 0.46),
    0 0 0 1px rgba(255, 255, 255, 0.6) inset;
}

html[data-theme="dark"] .mock-window:hover {
  border-color: #33415c;
  box-shadow:
    0 3px 10px rgba(0, 0, 0, 0.45),
    0 60px 120px -30px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(120, 160, 255, 0.12) inset;
}

.mock-float:hover {
  transform: translateY(-7px) scale(1.02);
  box-shadow: 0 26px 52px -18px rgba(80, 60, 20, 0.5);
}

html[data-theme="dark"] .mock-float:hover {
  box-shadow: 0 26px 52px -18px rgba(0, 0, 0, 0.85);
}

.mock-float-close {
  transition: color 0.2s ease, rotate 0.25s ease;
}

.mock-float-close:hover {
  rotate: 90deg;
  color: #e05a5a;
}

.mock-col-head svg {
  transition: scale 0.2s ease;
}

.mock-col-head:hover svg {
  scale: 1.12;
}

.mock-list li {
  transition: background-color 0.18s ease, color 0.18s ease;
}

.mock-list li:hover {
  background: #f2f7ff;
  color: #1b2537;
}

.mock-list li:hover .tick {
  border-color: #8db2f5;
}

html[data-theme="dark"] .mock-list li:hover {
  background: #142033;
  color: #e3ecfb;
}

html[data-theme="dark"] .mock-list li:hover .tick {
  border-color: #5f8fe0;
}

.mock-countdown {
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.mock-countdown:hover {
  border-color: #a9c9ff;
  box-shadow: 0 5px 14px -9px rgba(79, 125, 240, 0.5);
}

html[data-theme="dark"] .mock-countdown:hover {
  border-color: #3d66a8;
  box-shadow: 0 5px 16px -9px rgba(79, 125, 240, 0.6);
}

.mock-countdown-fill {
  overflow: hidden;
}

.mock-countdown-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, 0.55) 50%, transparent 70%);
  transform: translateX(-130%);
  animation: mock-countdown-shimmer 3.8s ease-in-out infinite;
}

html[data-theme="dark"] .mock-countdown-fill::after {
  background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, 0.22) 50%, transparent 70%);
}

.mock-sticky-card {
  transition: translate 0.2s ease, box-shadow 0.2s ease;
}

.mock-sticky-card:hover {
  translate: 0 -2px;
  box-shadow: 0 9px 18px -13px rgba(60, 80, 40, 0.4);
}

html[data-theme="dark"] .mock-sticky-card:hover {
  box-shadow: 0 10px 20px -13px rgba(0, 0, 0, 0.75);
}

.mock-top-right svg {
  transition: transform 0.35s ease, color 0.2s ease;
}

.mock-top-right svg:hover {
  transform: rotate(180deg);
  color: #4f7df0;
}

html[data-theme="dark"] .mock-top-right svg:hover {
  color: #9cbaff;
}

@keyframes mock-window-float {
  0%,
  100% {
    translate: 0 0;
  }

  50% {
    translate: 0 -5px;
  }
}

@keyframes mock-float-sway {
  0%,
  100% {
    rotate: 1.7deg;
    translate: 0 0;
  }

  50% {
    rotate: 0.8deg;
    translate: 0 -3px;
  }
}

@keyframes mock-countdown-shimmer {
  0% {
    transform: translateX(-130%);
  }

  55%,
  100% {
    transform: translateX(130%);
  }
}

/* 悬浮倒计时小球 */
.mock-ball {
  position: absolute;
  top: -50px;
  right: -16px;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 120px;
  height: 120px;
  transform-origin: 50% 60%;
  transition: transform 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
  animation: mock-ball-float 7s ease-in-out infinite;
}

.mock-ball-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from -90deg,
    #a9c6ff 0%,
    #6d9bff 32%,
    #3d6fe0 61%,
    rgba(79, 125, 240, 0.16) 61%,
    rgba(79, 125, 240, 0.16) 100%
  );
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 9px), #000 calc(100% - 8px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 9px), #000 calc(100% - 8px));
  filter: drop-shadow(0 0 6px rgba(79, 125, 240, 0.3));
  transition: filter 0.25s ease;
  animation: mock-ball-ring-pulse 4.8s ease-in-out infinite;
}

.mock-ball-face {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow:
    0 16px 30px -16px rgba(28, 58, 130, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.6) inset;
  transition: box-shadow 0.25s ease, background-color 0.25s ease;
  animation: mock-ball-face-breathe 6.4s ease-in-out infinite;
}

.mock-ball-time {
  font-size: 15px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: #1b2537;
  transition: color 0.2s ease, scale 0.2s ease;
  animation: mock-ball-time-bob 5.4s ease-in-out infinite;
}

.mock-ball-label {
  max-width: 82px;
  overflow: hidden;
  font-size: 9.5px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #8b97ab;
  transition: color 0.2s ease, opacity 0.2s ease;
  animation: mock-ball-label-fade 6s ease-in-out infinite;
  animation-delay: -2s;
}

/* 整体 hover：上浮放大，环更亮，球面更立体 */
.mock-ball:hover {
  transform: scale(1.045);
}

.mock-ball:hover .mock-ball-ring {
  filter: drop-shadow(0 0 12px rgba(79, 125, 240, 0.55));
}

.mock-ball:hover .mock-ball-face {
  background: #f7faff;
  box-shadow:
    0 22px 38px -16px rgba(28, 58, 130, 0.58),
    0 0 0 1px rgba(255, 255, 255, 0.85) inset;
}

.mock-ball:hover .mock-ball-time {
  color: #15213a;
}

.mock-ball:hover .mock-ball-label {
  color: #4f7df0;
  opacity: 1;
}

/* 各部件单独 hover */
.mock-ball-ring:hover {
  filter: drop-shadow(0 0 13px rgba(79, 125, 240, 0.65)) brightness(1.08);
}

.mock-ball-time:hover {
  scale: 1.08;
}

.mock-ball-label:hover {
  letter-spacing: 0.03em;
}

html[data-theme="dark"] .mock-ball-ring {
  background: conic-gradient(
    from -90deg,
    #b8d0ff 0%,
    #7ba1ff 32%,
    #4a7ae8 61%,
    rgba(123, 161, 255, 0.16) 61%,
    rgba(123, 161, 255, 0.16) 100%
  );
  filter: drop-shadow(0 0 6px rgba(123, 161, 255, 0.28));
}

html[data-theme="dark"] .mock-ball-face {
  background: #111a28;
  box-shadow:
    0 16px 30px -16px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(120, 160, 255, 0.1) inset;
}

html[data-theme="dark"] .mock-ball-time {
  color: #edf2fb;
}

html[data-theme="dark"] .mock-ball-label {
  color: #96a4b9;
}

html[data-theme="dark"] .mock-ball:hover .mock-ball-ring {
  filter: drop-shadow(0 0 12px rgba(123, 161, 255, 0.5));
}

html[data-theme="dark"] .mock-ball:hover .mock-ball-face {
  background: #162132;
  box-shadow:
    0 22px 38px -16px rgba(0, 0, 0, 0.92),
    0 0 0 1px rgba(120, 160, 255, 0.16) inset;
}

html[data-theme="dark"] .mock-ball:hover .mock-ball-time {
  color: #ffffff;
}

html[data-theme="dark"] .mock-ball:hover .mock-ball-label {
  color: #9cbaff;
}

html[data-theme="dark"] .mock-ball-ring:hover {
  filter: drop-shadow(0 0 13px rgba(123, 161, 255, 0.6)) brightness(1.06);
}

@keyframes mock-ball-float {
  0%,
  100% {
    translate: 0 0;
  }

  50% {
    translate: 0 -7px;
  }
}

@keyframes mock-ball-ring-pulse {
  0%,
  100% {
    opacity: 0.82;
  }

  50% {
    opacity: 1;
  }
}

@keyframes mock-ball-face-breathe {
  0%,
  100% {
    scale: 1;
  }

  50% {
    scale: 1.012;
  }
}

@keyframes mock-ball-time-bob {
  0%,
  100% {
    translate: 0 0;
  }

  50% {
    translate: 0 -1px;
  }
}

@keyframes mock-ball-label-fade {
  0%,
  100% {
    opacity: 0.68;
  }

  50% {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mock-window,
  .mock-float,
  .mock-countdown-fill::after,
  .mock-ball,
  .mock-ball-ring,
  .mock-ball-face,
  .mock-ball-time,
  .mock-ball-label {
    animation: none !important;
  }
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 96px 0;
}

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

.section-head {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}

.kicker {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
}

.section-head h2,
.split-copy h2 {
  margin-top: 12px;
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--text-0);
}

.section-sub {
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 功能卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card,
.duo-card,
.shortcut-card,
.release-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feature-card {
  padding: 26px 24px;
}

.feature-card:hover,
.duo-card:hover,
.shortcut-card:hover,
.release-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card-hover);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--brand-soft);
  color: var(--brand);
}

.feature-card h3 {
  margin-top: 17px;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-0);
}

.feature-card p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-2);
}

.extras {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 16px;
  margin-top: 32px;
  font-size: 12.5px;
  color: var(--text-3);
}

.extras ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.extras li {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-2);
}

/* ---------- 快捷键 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1.02fr;
  align-items: center;
  gap: 72px;
}

.split-copy p {
  margin-top: 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-2);
}

.split-copy .split-note {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--text-3);
}

.split-highlight {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: 12px;
  background: var(--brand-wash);
}

.split-highlight b {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-0);
}

.split-highlight p {
  margin-top: 5px !important;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-2);
}

.split-highlight kbd {
  display: inline-flex;
  align-items: center;
  padding: 0 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--bg-elevated);
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-1);
}

.shortcut-card {
  padding: 6px 24px;
}

.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--text-1);
}

.shortcut-row:last-child {
  border-bottom: 0;
}

.keys {
  display: flex;
  gap: 5px;
}

.keys kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 27px;
  height: 27px;
  padding: 0 7px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--bg-soft);
  font-family: inherit;
  font-size: 12px;
  color: var(--text-2);
}

/* ---------- 本地与 AI ---------- */
.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.duo-card {
  padding: 28px 26px;
}

.duo-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.duo-head h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-0);
}

.duo-head p {
  margin-top: 3px;
  font-size: 13px;
  color: var(--text-2);
}

.file-tree {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 11px;
  background: #0d1626;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.95;
  color: #a9b8ce;
  overflow-x: auto;
}

html[data-theme="dark"] .file-tree {
  border: 1px solid #1d2839;
  background: #070c14;
}

.file-tree-title {
  margin-bottom: 6px;
  font-size: 10.5px;
  color: #63748e;
  letter-spacing: 0.01em;
}

.file-row {
  display: grid;
  grid-template-columns: 18px 150px minmax(0, 1fr);
  white-space: nowrap;
}

.tree-branch {
  color: #3f5270;
}

.file-name {
  color: #dbe6f7;
}

.file-desc {
  color: #6f829d;
}

.duo-foot {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-3);
}

.steps {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.steps li {
  display: flex;
  gap: 11px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 21px;
  height: 21px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--brand-soft);
  font-size: 11px;
  font-weight: 600;
  color: var(--brand);
}

/* ---------- 更新日志 ---------- */
.release-layout {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  align-items: start;
  gap: 24px;
}

.release-card {
  padding: 26px 28px;
}

.release-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.release-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

.release-head h3 {
  margin-top: 6px;
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--text-0);
}

.release-notes {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--text-2);
}

.release-notes ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.release-notes li {
  position: relative;
  padding-left: 16px;
}

.release-notes li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brand);
}

.release-notes p + p {
  margin-top: 8px;
}

.release-empty {
  color: var(--text-3);
}

html[data-theme="dark"] .release-notes li::before {
  background: var(--brand);
}

.release-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--text-3);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--brand);
  transition: gap 0.18s ease, color 0.18s ease;
}

.text-link:hover {
  gap: 8px;
  color: var(--brand-strong);
}

.release-aside {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 10px 4px 0 6px;
}

.aside-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.aside-num {
  flex-shrink: 0;
  min-width: 34px;
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, var(--brand), color-mix(in srgb, var(--brand) 45%, transparent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.aside-item b {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-0);
}

.aside-item p {
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-3);
}

.aside-item code {
  padding: 1px 4px;
  border-radius: 4px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-size: 11.5px;
}

/* ---------- 底部 CTA ---------- */
.cta-section {
  padding: 24px 0 96px;
}

.cta-card {
  position: relative;
  overflow: hidden;
  padding: 64px 32px 58px;
  border-radius: 24px;
  background:
    radial-gradient(560px 260px at 18% 0%, rgba(255, 255, 255, 0.22), transparent 65%),
    radial-gradient(480px 280px at 88% 100%, rgba(150, 190, 255, 0.28), transparent 70%),
    linear-gradient(135deg, #2a55cf 0%, #4f7df0 52%, #6f9bff 100%);
  text-align: center;
  color: #fff;
  box-shadow: 0 32px 70px -34px rgba(40, 80, 190, 0.65);
}

.cta-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 15px;
  box-shadow: 0 10px 24px -10px rgba(10, 25, 70, 0.6);
}

.cta-card h2 {
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.cta-card p {
  max-width: 540px;
  margin: 14px auto 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.cta-card .btn-primary {
  background: #ffffff;
  border-color: rgba(255, 255, 255, 0.7);
  color: #2f5bd0;
  box-shadow: 0 6px 18px -8px rgba(10, 25, 70, 0.5);
}

.cta-card .btn-primary:hover {
  background: #f4f8ff;
}

.cta-card .btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.34);
  color: #fff;
  box-shadow: none;
}

.cta-card .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.cta-code {
  padding: 1px 6px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.14);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.92);
  overflow-wrap: anywhere;
}

.cta-hint {
  margin-top: 16px !important;
  font-size: 11.5px !important;
  color: rgba(255, 255, 255, 0.6) !important;
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  color: var(--text-3);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text-1);
}

.footer-brand img {
  border-radius: 5px;
}

.footer-copy {
  margin-left: 12px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--brand);
}

/* ---------- 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.65s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.65s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .split {
    gap: 44px;
  }

  .mock-grid {
    gap: 16px;
  }

  .mock-float {
    display: none;
  }

  .mock-ball {
    top: -42px;
    right: -8px;
    width: 104px;
    height: 104px;
  }

  .mock-ball-face {
    width: 94px;
    height: 94px;
  }

  .mock-ball-time {
    font-size: 14px;
  }

  .mock-ball-label {
    max-width: 72px;
  }
}

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

  .hero {
    padding: 68px 0 76px;
  }

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

  .mock-col-sticky {
    display: none;
  }

  .mock-float {
    display: none;
  }

  .mock-ball {
    top: -36px;
    right: 0;
    width: 88px;
    height: 88px;
  }

  .mock-ball-face {
    width: 79px;
    height: 79px;
  }

  .mock-ball-time {
    font-size: 12.5px;
  }

  .mock-ball-label {
    max-width: 60px;
    font-size: 9px;
  }

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

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

  .release-layout {
    grid-template-columns: 1fr;
  }

  .release-aside {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 18px 32px;
    padding: 4px 2px 0;
  }

  .aside-item {
    flex: 1 1 220px;
  }

  .section {
    padding: 72px 0;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(1140px, 100% - 36px);
  }

  .nav {
    height: 58px;
    gap: 12px;
  }

  .brand-name {
    font-size: 15px;
  }

  .nav-github span {
    display: none;
  }

  .nav-github {
    width: 34px;
    padding: 0;
  }

  .hero h1 {
    font-size: clamp(2rem, 8.4vw, 2.6rem);
  }

  .hero-sub br.desktop-only {
    display: none;
  }

  .hero-meta {
    gap: 6px;
    font-size: 11px;
  }

  .hero-points {
    gap: 8px;
  }

  .hero-points li {
    font-size: 11.5px;
    padding: 7px 12px;
  }

  .app-mock {
    margin-top: 46px;
  }

  .mock-content {
    padding: 14px 14px 16px;
  }

  .mock-ball {
    top: -28px;
    right: -4px;
    width: 72px;
    height: 72px;
  }

  .mock-ball-face {
    width: 65px;
    height: 65px;
  }

  .mock-ball-time {
    font-size: 11px;
  }

  .mock-ball-label {
    max-width: 50px;
    font-size: 8px;
  }

  .mock-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .mock-grid .mock-col:nth-child(2) {
    display: none;
  }

  .mock-top {
    flex-wrap: wrap;
  }

  .mock-top-right {
    margin-left: auto;
  }

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

  .section-head {
    margin-bottom: 34px;
  }

  .section {
    padding: 60px 0;
  }

  .cta-card {
    padding: 48px 22px 44px;
    border-radius: 20px;
  }

  .cta-section {
    padding-bottom: 68px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .footer-copy {
    margin-left: 0;
  }

  .file-tree {
    font-size: 10.5px;
    padding: 14px;
  }

  .file-row {
    grid-template-columns: 16px 140px minmax(0, 1fr);
  }

  .release-card {
    padding: 22px 20px;
  }

  .release-aside {
    flex-direction: column;
    gap: 18px;
  }
}

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

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

  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}