/* ==========================================================================
   喜劳转扩 MeQR v3 — 彩虹舞台 · 亮色版
   Design: PJSK 彩虹渐变 × maimai 粉金 × Apple 结构清晰 · 亮色底
   ========================================================================== */

:root {
  /* === 亮色基底 === */
  --bg:        #f9f7ff;
  --bg-2:      #ffffff;
  --surface:   #ffffff;
  --surface-h: rgba(255,255,255,0.96);
  --border:    rgba(13,10,40,0.10);
  --border-b:  rgba(13,10,40,0.18);

  /* === Project SEKAI unit palette === */
  --pjsk-virtual-singer: #39C5BB;
  --pjsk-leoneed: #00A0E9;
  --pjsk-momojan: #88DD44;
  --pjsk-vbs: #EE1166;
  --pjsk-wxs: #FF9900;
  --pjsk-nightcord: #884499;
  --pjsk-leoneed-deep: #0077B6;
  --pjsk-momojan-deep: #5EA928;
  --pjsk-vbs-deep: #C90D53;
  --pjsk-wxs-deep: #D77800;
  --pjsk-nightcord-deep: #6C347D;
  --pjsk-virtual-singer-deep: #168F84;

  --clr-r: var(--pjsk-vbs);
  --clr-o: var(--pjsk-wxs);
  --clr-y: #F6D94A;
  --clr-g: var(--pjsk-momojan);
  --clr-b: var(--pjsk-leoneed);
  --clr-p: var(--pjsk-nightcord);
  /* 两个周期拼在一起，background-position 0→200% 循环时首尾一致，避免硬跳 */
  --rainbow: linear-gradient(90deg, var(--pjsk-virtual-singer), var(--pjsk-leoneed), var(--pjsk-momojan), var(--pjsk-vbs), var(--pjsk-wxs), var(--pjsk-nightcord), var(--pjsk-virtual-singer), var(--pjsk-leoneed), var(--pjsk-momojan), var(--pjsk-vbs), var(--pjsk-wxs), var(--pjsk-nightcord), var(--pjsk-virtual-singer));

  /* === Shared semantic accents === */
  --pink:      var(--pjsk-vbs);
  --pink-soft: rgba(238,17,102,0.12);
  --gold:      var(--pjsk-wxs);
  --gold-soft: rgba(255,153,0,0.16);

  /* === 品牌 teal === */
  --teal:      var(--pjsk-virtual-singer);
  --teal-soft: rgba(57,197,187,0.14);
  --teal-deep: var(--pjsk-virtual-singer-deep);
  --teal-ink:  #0a3b38;

  /* === 文本 === */
  --ink:        #0d0a28;
  --ink-soft:   rgba(13,10,40,0.62);
  --ink-muted:  rgba(13,10,40,0.40);
  --white:      #ffffff;

  /* === 字体 === */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro SC",
    "PingFang SC", "Helvetica Neue", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;

  /* === 几何 === */
  --r-sm:  10px;
  --r-md:  16px;
  --r-lg:  24px;
  --r-xl:  32px;

  /* === 阴影 === */
  --shadow-sm: 0 4px 16px rgba(13,10,40,0.07);
  --shadow-md: 0 12px 36px rgba(13,10,40,0.11);
  --shadow-lg: 0 24px 64px rgba(13,10,40,0.15);

  /* === 布局 === */
  --max: 1180px;
  --header-h: 62px;
  --gutter: clamp(20px, 5vw, 48px);
}

/* -------- Reset -------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001s !important; transition-duration: .001s !important; }
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: var(--pink); color: #fff; }

/* -------- 布局 -------- */
.wrap {
  width: min(var(--max), calc(100% - 2 * var(--gutter)));
  margin-inline: auto;
}

/* -------- 全局背景（亮色柔和辉光） -------- */
.bg-canvas {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.bg-glow { position: absolute; border-radius: 50%; filter: blur(120px); }
.glow-pink   { width: 700px; height: 700px; background: radial-gradient(circle, rgba(255,45,140,.14), transparent 65%);  top: -280px; left: 22%; }
.glow-blue   { width: 520px; height: 520px; background: radial-gradient(circle, rgba(77,150,255,.10), transparent 65%);  top: 35%; right: -130px; }
.glow-purple { width: 440px; height: 440px; background: radial-gradient(circle, rgba(199,125,255,.10), transparent 65%); bottom: 5%; left: -100px; }
.bg-stars { display: none; }

.site-header, main, .site-footer { position: relative; z-index: 1; }

/* -------- 排版 -------- */
.h-section { font-size: 58px; line-height: 1.06; font-weight: 760; }
.h-lead    { font-size: 36px; line-height: 1.22; font-weight: 720; }
.lede      { font-size: 18px; line-height: 1.85; color: var(--ink-soft); }

/* 彩虹渐变文字（静态 fallback；JS 会替换为随机 PJSK 成员色） */
.rainbow-text {
  background: var(--rainbow); background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.grad-pink { background: linear-gradient(100deg, var(--pink) 10%, var(--gold)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-teal { background: linear-gradient(100deg, var(--teal) 10%, #4D96FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
@keyframes rainbow-shift { to { background-position: 200% center; } }

/* 章节编号胶囊：每页用自己的团色（--unit-accent） */
.home-page    { --unit-accent: var(--pjsk-virtual-singer); }
.privacy-page { --unit-accent: var(--pjsk-virtual-singer); }
.download-page { --unit-accent: var(--pjsk-leoneed); }
.develop-page { --unit-accent: var(--pjsk-momojan); }
.logs-page    { --unit-accent: var(--pjsk-nightcord); }
.sponsor-page { --unit-accent: var(--pjsk-vbs); }
.contact-page { --unit-accent: var(--pjsk-virtual-singer); }
.sec {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 800; letter-spacing: 0.12em;
}
.sec .num {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 34px; height: 26px; padding: 0 10px; border-radius: 999px;
  background: var(--unit-accent, var(--pjsk-vbs));
  color: #fff; font-weight: 800; box-shadow: 0 4px 14px rgba(13,10,40,.16);
}
.develop-page .sec .num { color: #17320c; }
.sec .lbl { color: var(--ink-muted); font-weight: 700; }

/* Eyebrow */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-muted);
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--teal);
  animation: pulse-teal 2.6s ease-out infinite;
}
.eyebrow .dot.dot-pink { background: var(--pink); animation: pulse-pink 2.6s ease-out infinite; }
@keyframes pulse-teal { 70%,100%{ box-shadow: 0 0 0 10px rgba(57,197,187,0); } }
@keyframes pulse-pink { 70%,100%{ box-shadow: 0 0 0 10px rgba(255,45,140,0); } }

/* -------- 按钮 -------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px; height: 54px; padding: 0 26px; border-radius: 999px;
  font-size: 16px; font-weight: 720; letter-spacing: 0.01em; border: 1.5px solid transparent;
  transition: transform .28s cubic-bezier(.2,.7,.3,1.4), box-shadow .28s ease;
  will-change: transform;
}
.btn .arrow { transition: transform .25s ease; }
.btn:hover .arrow { transform: translateX(4px); }
.btn:active { transform: scale(0.97); }

.btn-rainbow {
  background: #D90E5B; color: #fff;
  box-shadow: 0 8px 28px rgba(217,14,91,.30);
}
.btn-rainbow:hover { background: #B30A49; color: #fff; transform: translateY(-3px); box-shadow: 0 14px 38px rgba(217,14,91,.40); }

.btn-glass {
  background: rgba(13,10,40,0.06); border-color: var(--border-b); color: var(--ink);
}
.btn-glass:hover { background: rgba(13,10,40,0.10); border-color: var(--ink); transform: translateY(-2px); }

/* -------- 头部导航 -------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(249,247,255,0.82);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 780; font-size: 17px; color: var(--ink);
}
.brand img { width: 30px; height: 30px; border-radius: 8px; box-shadow: var(--shadow-sm); }
.brand span { font-size: 17px; }
.brand small { font-size: 11px; font-weight: 700; color: var(--ink-muted); letter-spacing: .08em; margin-left: 2px; }

.desktop-nav { display: flex; align-items: center; gap: 4px; }
.desktop-nav a {
  padding: 9px 15px; border-radius: 999px; font-size: 15px; font-weight: 650; color: var(--ink-soft);
  transition: color .2s ease, background-color .2s ease;
}
.desktop-nav a:hover { color: var(--ink); background: rgba(13,10,40,0.06); }
.desktop-nav a.is-current { color: var(--ink); background: rgba(13,10,40,0.07); }

.header-cta {
  display: inline-flex; align-items: center; height: 38px; padding: 0 18px;
  border-radius: 999px; background: #D90E5B; color: #fff;
  font-size: 14px; font-weight: 750; box-shadow: 0 4px 16px rgba(217,14,91,.28);
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.header-cta:hover { background: #B30A49; color: #fff; transform: translateY(-1px); box-shadow: 0 8px 26px rgba(217,14,91,.38); }

/* 移动端导航 */
.nav-toggle {
  display: none; flex-direction: column; gap: 4px;
  width: 42px; height: 42px; align-items: center; justify-content: center;
  background: transparent; border: 0; border-radius: 12px;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px;
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
@media (max-width: 820px) {
  .nav-toggle { display: flex; }
  .desktop-nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 6px;
    padding: 16px var(--gutter) calc(20px + env(safe-area-inset-bottom));
    background: rgba(249,247,255,0.97); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .22s ease, transform .22s ease;
  }
  .desktop-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .desktop-nav a { padding: 15px 12px; font-size: 17px; border-radius: 14px; }
  .header-cta { display: none; }
}

/* -------- Hero -------- */
.hero { position: relative; padding: 90px 0 64px; overflow: hidden; }

/* 柔光晕 */
.hero-spotlight {
  position: absolute; top: -100px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 680px; pointer-events: none;
  background: radial-gradient(ellipse at 50% 20%,
    rgba(255,45,140,.10) 0%, rgba(199,125,255,.07) 40%, transparent 70%);
}
/* 舞台光束（亮色版，非常淡） */
.hero-beams { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.beam { position: absolute; top: -20px; width: 2px; height: 120%; transform-origin: top center; }
.b1 { left: 28%; background: linear-gradient(to bottom, transparent, rgba(255,45,140,.07) 30%, transparent); transform: skewX(-20deg); }
.b2 { left: 50%; background: linear-gradient(to bottom, transparent, rgba(13,10,40,.05) 30%, transparent); }
.b3 { left: 70%; background: linear-gradient(to bottom, transparent, rgba(77,150,255,.07) 30%, transparent); transform: skewX(16deg); }

.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: minmax(0,1.1fr) minmax(0,0.9fr);
  align-items: center; gap: clamp(40px,6vw,80px);
}

/* 状态胶囊 */
/* Hero 大标题 */
.hero .eyebrow { margin-bottom: clamp(18px,2.5vw,30px); }
.hero h1 { font-size: 78px; line-height: 1.03; font-weight: 790; color: var(--ink); }
.hero h1 .line { display: block; white-space: nowrap; }
.hero-lede { margin-top: clamp(20px,3vw,28px); max-width: 28em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: clamp(28px,4vw,42px); }

/* Hero 通行证构图 */
.hero-visual { position: relative; height: clamp(420px,48vw,580px); overflow: hidden; }
.pass-halo {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 72%; height: 72%; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,45,140,.15) 0%, rgba(199,125,255,.07) 50%, transparent 70%);
  filter: blur(30px); z-index: 0;
}
.pass-stage { position: absolute; inset: 0; }

/* 浮动装饰球 */
.orb { position: absolute; border-radius: 50%; z-index: 4; }
.orb-pink  { width: 64px; height: 64px; background: var(--pink); top: 5%; right: 8%; box-shadow: 0 8px 28px rgba(255,45,140,.5); animation: floatY 7s ease-in-out infinite; }
.orb-blue  { width: 44px; height: 44px; background: #4D96FF; bottom: 10%; left: 5%; border-radius: 14px; box-shadow: 0 8px 20px rgba(77,150,255,.45); animation: floatY 9.5s ease-in-out infinite reverse; }
.orb-gold  { width: 88px; height: 24px; background: var(--gold); top: 13%; left: 3%; border-radius: 999px; box-shadow: 0 6px 18px rgba(240,192,96,.5); animation: floatX 8s ease-in-out infinite; }
@keyframes floatY { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-18px)} }
@keyframes floatX { 0%,100%{transform:translateX(0) rotate(-6deg)} 50%{transform:translateX(14px) rotate(-6deg)} }

/* 通行证卡片 */
.pass-card {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: clamp(240px,24vw,320px); height: clamp(324px,32.4vw,432px);
  border-radius: 28px; overflow: hidden; background: #f0eeff; z-index: 3;
}
.pass-card img { width: 100%; height: 100%; object-fit: cover; }
.card-main { box-shadow: 0 0 0 1px rgba(255,255,255,.6), var(--shadow-lg), 0 0 40px rgba(255,45,140,.12); }
.card-back {
  z-index: 1; transform: translate(calc(-50% - 22px), calc(-50% + 28px)) rotate(-7deg);
  background: linear-gradient(150deg, rgba(57,197,187,.14), rgba(255,45,140,.1));
  border: 1px dashed rgba(13,10,40,.16); opacity: .7;
}
.card-edge {
  z-index: 2; transform: translate(calc(-50% + 20px), calc(-50% - 24px)) rotate(5deg);
  background: rgba(240,192,96,.12); border: 1px solid rgba(240,192,96,.35); opacity: .8;
}

/* 印章 */
.stamp {
  position: absolute; z-index: 5; width: 108px; height: 108px; border-radius: 50%;
  display: grid; place-items: center; text-align: center;
  padding: 0 10px; box-sizing: border-box;
  font-size: 10px; font-weight: 800; letter-spacing: .14em;
  color: var(--pink); border: 2px solid currentColor;
  background: rgba(255,255,255,.82); backdrop-filter: blur(6px);
  box-shadow: 0 4px 18px rgba(255,45,140,.2);
}
.stamp b { display: block; font-size: 17px; letter-spacing: .06em; line-height: 1.1; }
.stamp i { display: block; font-style: normal; font-size: 7px; margin-top: 2px; letter-spacing: .06em; white-space: nowrap; }
.s-beta { top: 3%; left: 1%; transform: rotate(-16deg); animation: floatY 6.5s ease-in-out infinite; }
.s-2026 {
  right: 1%; bottom: 3%; transform: rotate(8deg);
  color: var(--teal-deep); border-color: var(--teal-deep);
  box-shadow: 0 4px 18px rgba(57,197,187,.2);
  animation: floatY 6.5s ease-in-out infinite; animation-delay: -3.2s;
}

/* -------- 跑马灯（保持深色） -------- */
.marquee {
  position: relative; overflow: hidden;
  background: var(--ink); border-top: none; border-bottom: none;
}
.rainbow-rule { height: 2px; background: var(--rainbow); background-size: 200% auto; animation: rainbow-shift 5s linear infinite; }
.marquee-track {
  display: flex; gap: 0; width: max-content; padding: 15px 0;
  animation: marquee 28s linear infinite; white-space: nowrap;
}
.marquee-track span { font-size: 28px; font-weight: 800; letter-spacing: .06em; padding: 0 18px; color: #fff; }
.marquee-track span.outline { color: transparent; -webkit-text-stroke: 1.5px rgba(255,255,255,.42); }
.marquee-track i {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--pink); box-shadow: 0 0 8px rgba(255,45,140,.8);
  margin: 0 20px; align-self: center;
}
@keyframes marquee { to { transform: translateX(-50%); } }

/* -------- 通用分区 -------- */
.section { padding: 100px 0; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px;
  margin-bottom: clamp(36px,5vw,60px);
}
.section-head h2 { max-width: 16ch; }

/* 陈述区 */
.statement-body {
  margin-top: 26px; max-width: 46em; font-size: 19px; line-height: 1.9; color: var(--ink-soft);
}

/* -------- 展示区 -------- */
.showcase {
  position: relative; overflow: hidden;
  background: var(--white); border-radius: var(--r-xl);
  border: 1px solid var(--border); box-shadow: var(--shadow-md);
  padding: clamp(28px,4vw,52px);
}
.showcase-top-line {
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--pink) 30%, var(--clr-b) 70%, transparent);
}
.showcase-inner {
  display: grid; grid-template-columns: minmax(0,0.9fr) minmax(0,1.1fr);
  gap: clamp(28px,4vw,60px); align-items: center;
}
.stage-title { margin-top: 14px; color: var(--ink); }
.stage-desc { margin-top: 14px; max-width: 34em; color: var(--ink-soft); font-size: 16px; line-height: 1.78; }

.stage-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.stage-tab {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 999px;
  border: 1.5px solid var(--border); background: #f4f2fa;
  color: var(--ink-soft); font-size: 14px; font-weight: 700;
  transition: all .2s ease;
}
.tab-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ink-muted); transition: background .2s ease; }
.stage-tab:hover { border-color: var(--ink); color: var(--ink); }
.stage-tab.is-active {
  background: var(--ink); color: #fff; border-color: var(--ink);
  box-shadow: 0 8px 22px rgba(13,10,40,.2);
}
.stage-tab.is-active .tab-dot { background: var(--teal); box-shadow: 0 0 6px rgba(57,197,187,.6); }

.stage-device { position: relative; display: grid; place-items: center; min-height: 420px; }
.stage-device::before {
  content: ""; position: absolute; width: 68%; height: 78%; border-radius: 8px;
  background: rgba(255,45,140,.06); border: 1px solid rgba(255,45,140,.12); transform: rotate(-4deg);
}
.phone {
  position: relative; z-index: 2;
  width: clamp(230px,22vw,292px); aspect-ratio: 9/19.2;
  border-radius: clamp(34px,4vw,46px); background: #0d0a28; padding: 10px;
  box-shadow: 0 0 0 1px rgba(255,255,255,.12) inset, var(--shadow-lg);
}
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: clamp(26px,3.4vw,38px); }
.phone .notch {
  position: absolute; top: 18px; left: 50%; transform: translateX(-50%);
  width: 38%; height: 20px; background: #0d0a28; border-radius: 99px; z-index: 3;
}
.phone-glow {
  position: absolute; width: 80%; height: 80%; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,45,140,.08) 0%, transparent 70%); filter: blur(24px); z-index: 1;
}

/* -------- 功能色块网格（实心） -------- */
.feature-grid {
  display: grid; grid-template-columns: repeat(2,1fr); gap: clamp(14px,2vw,20px);
}
.feature-card {
  position: relative; overflow: hidden; border-radius: var(--r-lg);
  padding: clamp(28px,3.4vw,44px); min-height: 280px;
  display: flex; flex-direction: column; justify-content: space-between;
  transition: transform .38s cubic-bezier(.2,.7,.3,1.1), box-shadow .38s ease;
}
.feature-card:hover { transform: translateY(-6px); }
.fc-glow-bar { position: absolute; top: 0; left: 0; right: 0; height: 0; }

/* 浅色渐变卡片（PJSK 色相的柔和版，保证文字可读） */
.fc-teal   { background: linear-gradient(150deg, #DDF8F3, #C7F0E9); color: var(--teal-ink); box-shadow: 0 8px 28px rgba(22,143,132,.16); }
.fc-pink   { background: linear-gradient(150deg, #FDE4EF, #FBD0E3); color: #571032; box-shadow: 0 8px 28px rgba(201,13,83,.14); }
.fc-gold   { background: linear-gradient(150deg, #FFF2D6, #FFE5B3); color: #453000; box-shadow: 0 8px 28px rgba(215,120,0,.14); }
.fc-rainbow { background: linear-gradient(150deg, #EFEBFC, #E1DAF8); color: #221b45; box-shadow: 0 8px 28px rgba(108,52,125,.14); }

.fc-teal:hover   { box-shadow: 0 14px 40px rgba(22,143,132,.24); }
.fc-pink:hover   { box-shadow: 0 14px 40px rgba(201,13,83,.22); }
.fc-gold:hover   { box-shadow: 0 14px 40px rgba(215,120,0,.22); }
.fc-rainbow:hover{ box-shadow: 0 14px 40px rgba(108,52,125,.22); }

/* 右下角装饰圆 */
.feature-card::after {
  content: ""; position: absolute; right: -30px; bottom: -30px;
  width: 140px; height: 140px; border-radius: 50%; opacity: .5;
}
.fc-teal::after   { background: rgba(255,255,255,.65); }
.fc-pink::after   { background: rgba(255,255,255,.55); }
.fc-gold::after   { background: rgba(255,255,255,.55); }
.fc-rainbow::after {
  background: linear-gradient(135deg, rgba(57,197,187,.35), rgba(238,17,102,.25));
  filter: blur(2px);
}

.fc-body { flex: 1; position: relative; z-index: 1; }

.feature-num { font-size: 13px; font-weight: 800; letter-spacing: .14em; opacity: .65; }
.feature-card h3 { font-size: 28px; font-weight: 780; line-height: 1.14; margin-top: 18px; }
.feature-card p  { margin-top: 14px; font-size: 16px; line-height: 1.8; opacity: .88; }
.feature-foot    { margin-top: 24px; font-size: 12px; font-weight: 700; letter-spacing: .12em; opacity: .65; position: relative; z-index: 1; }

/* 调色板展示 */
.palette-show { display: flex; flex-direction: column; gap: 12px; margin-top: 26px; }
.palette-row  { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.swatch-dot   { width: 18px; height: 18px; border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(255,255,255,.3); }
.tag-chip {
  display: inline-flex; align-items: center; padding: 5px 12px; border-radius: 999px;
  font-size: 13px; font-weight: 700;
  color: var(--tag-fg, #fff); background: var(--tag-bg, var(--teal));
}
/* WS 五色拼渐变（对应 App 实际颜色） */
.tc-split {
  background: linear-gradient(90deg,
    #FF9900 0 20%, #FFBB00 20% 40%, #FF66BB 40% 60%, #33DD99 60% 80%, #BB88EE 80% 100%);
  color: #fff;
}
.tc-six {
  background: linear-gradient(90deg,
    #39C5BB 0 16.6%, #00A0E9 16.6% 33.3%, #88DD44 33.3% 50%,
    #FF9900 50% 66.6%, #EE1166 66.6% 83.3%, #884499 83.3% 100%);
  color: #fff;
}

/* -------- 平台双色带（保持深色） -------- */
.platform-bands { display: grid; gap: clamp(14px,2vw,20px); }
.platform-band {
  position: relative; overflow: hidden; border-radius: var(--r-lg);
  padding: clamp(32px,4vw,56px); color: #fff;
}
.pband-ios     { background: linear-gradient(140deg, #0b3f3b, #0e6b64 55%, var(--teal)); }
.pband-android { background: linear-gradient(140deg, #12102a, #19163d 55%, #211c50); }

.pband-ring { position: absolute; inset: 0; border-radius: var(--r-lg); overflow: hidden; pointer-events: none; }
.pband-ios .pband-ring::before,
.pband-ios .pband-ring::after,
.pband-android .pband-ring::before,
.pband-android .pband-ring::after {
  content: ""; position: absolute; border-radius: 50%; border: 1.5px solid rgba(255,255,255,.16);
}
.pband-ios .pband-ring::before     { width: 440px; height: 440px; right: -130px; top: -180px; }
.pband-ios .pband-ring::after      { width: 280px; height: 280px; right: 80px;  top: -80px; }
.pband-android .pband-ring::before { width: 440px; height: 440px; right: -130px; top: -180px; }
.pband-android .pband-ring::after  { width: 280px; height: 280px; right: 80px;  top: -80px; }

.pband-content { position: relative; z-index: 2; display: flex; justify-content: space-between; gap: 32px; align-items: flex-end; flex-wrap: wrap; }
.pband-label { font-size: 13px; font-weight: 800; letter-spacing: .16em; opacity: .65; }
.pband-content h2 { margin-top: 14px; font-size: 42px; line-height: 1.1; font-weight: 760; }
.pband-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.pband-tags span {
  padding: 8px 14px; border-radius: 999px; font-size: 14px; font-weight: 700;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); backdrop-filter: blur(4px);
}
.pband-badge {
  display: grid; place-items: center; width: 104px; height: 104px; border-radius: 28px;
  font-size: 12px; font-weight: 800; letter-spacing: .1em; text-align: center;
  transform: rotate(6deg); flex: 0 0 auto;
}
.pband-ios     .pband-badge { background: var(--teal); color: #04231f; box-shadow: 0 8px 30px rgba(57,197,187,.4); }
.pband-android .pband-badge { background: var(--pjsk-momojan); color: #17320c; box-shadow: 0 8px 30px rgba(136,221,68,.35); }

/* -------- 里程碑 -------- */
.milestone-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(14px,2vw,20px); margin-top: 40px; }
.milestone-card {
  position: relative; padding: clamp(22px,2.6vw,32px); border-radius: var(--r-md);
  border: 1px solid var(--border); background: var(--white); box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.milestone-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.m-date { font-size: 12px; font-weight: 800; letter-spacing: .12em; color: var(--ink-muted); }
.milestone-card h3 { margin-top: 12px; font-size: 20px; font-weight: 750; color: var(--ink); }
.milestone-card p  { margin-top: 8px; font-size: 15px; color: var(--ink-soft); line-height: 1.7; }
.m-bar { position: absolute; top: 0; left: 0; right: 0; height: 4px; border-radius: var(--r-md) var(--r-md) 0 0; }
.mc-teal { background: var(--teal); }
.mc-pink { background: var(--pink); }
.mc-gold { background: var(--gold); }

/* -------- About -------- */
.about-grid { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr); gap: clamp(32px,5vw,72px); align-items: start; }
.about-card {
  position: relative; padding: clamp(24px,3vw,36px); border-radius: var(--r-lg);
  background: var(--ink); color: #fff; overflow: hidden;
}
.about-top-line {
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--rainbow); background-size: 200% auto; animation: rainbow-shift 5s linear infinite;
}
.aq { position: absolute; right: 16px; top: 4px; font-size: 100px; font-weight: 800; color: rgba(255,255,255,.05); line-height: 1; }
.about-card .lede { color: rgba(255,255,255,.95); }
.about-card ul { margin-top: 18px; display: grid; gap: 10px; }
.about-card li { display: flex; align-items: center; gap: 10px; font-size: 15px; color: rgba(255,255,255,.75); }
.about-card li::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--teal); flex: 0 0 auto; }

/* -------- 隐私带（深色） -------- */
.privacy-band {
  position: relative; border-radius: var(--r-xl); overflow: hidden;
  background: linear-gradient(135deg, var(--teal-ink), #0c4d49);
  color: #fff; padding: clamp(36px,5vw,64px);
  display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 36px; align-items: center;
}
.privacy-top-line {
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--teal), transparent);
}
.privacy-band h2 { font-size: 44px; line-height: 1.08; font-weight: 760; }
.privacy-band p { margin-top: 16px; font-size: 16px; line-height: 1.85; color: rgba(255,255,255,.78); }
.privacy-link {
  display: inline-flex; align-items: center; gap: 12px;
  margin-top: 24px; padding: 16px 24px; border-radius: 999px;
  background: #fff; color: var(--ink); font-weight: 750;
  transition: transform .28s cubic-bezier(.2,.7,.3,1.4);
}
.privacy-link:hover { transform: translateX(5px); }

/* -------- 页脚（深色） -------- */
.site-footer {
  background: var(--ink); color: rgba(255,255,255,.65);
  margin-top: clamp(48px,7vw,90px); padding: clamp(44px,6vw,72px) 0 40px;
}
.footer-top-line {
  height: 3px; margin-bottom: clamp(36px,5vw,56px);
  background: var(--rainbow); background-size: 200% auto;
  animation: rainbow-shift 5s linear infinite;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(2,1fr) 1.2fr; gap: 32px; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 40px; height: 40px; border-radius: 11px; }
.footer-brand strong { display: block; color: #fff; font-size: 17px; }
.footer-brand small { font-size: 13px; color: rgba(255,255,255,.45); }
.footer-col h4 { color: #fff; font-size: 13px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 16px; }
.footer-col a { display: block; padding: 6px 0; font-size: 15px; color: rgba(255,255,255,.6); transition: color .2s ease; }
.footer-col a:hover { color: #fff; }
.footer-legal {
  margin-top: 44px; padding-top: 26px; border-top: 1px solid rgba(255,255,255,.1);
  display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: center;
  font-size: 13px; color: rgba(255,255,255,.45);
}
.footer-legal a { color: rgba(255,255,255,.48); transition: color .2s ease; }
.footer-legal a:hover { color: #fff; }
.footer-legal img { display: inline; height: 15px; width: auto; vertical-align: -3px; margin-right: 6px; }

/* -------- 滚动揭示 -------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }

:where(a,button):focus-visible { outline: 3px solid var(--pink); outline-offset: 3px; }

/* -------- 首页专属 · Virtual Singer 主题（#39C5BB） --------
   全站共享元素保持多团配色，以下仅把首页主 accent 从 VBS 粉换成 VS 青 */
.home-page {
  background: linear-gradient(rgba(57,197,187,.08), rgba(57,197,187,.045)), var(--bg);
}
.home-page .glow-pink {
  background: radial-gradient(circle, rgba(57,197,187,.16), transparent 65%);
}
.home-page .hero-spotlight {
  background: radial-gradient(ellipse at 50% 20%,
    rgba(57,197,187,.12) 0%, rgba(0,104,183,.06) 40%, transparent 70%);
}
.home-page .pass-halo {
  background: radial-gradient(circle, rgba(57,197,187,.16) 0%, rgba(0,104,183,.07) 50%, transparent 70%);
}
.home-page .b1 { background: linear-gradient(to bottom, transparent, rgba(57,197,187,.08) 30%, transparent); }
.home-page .orb-pink { background: var(--teal); box-shadow: 0 8px 28px rgba(57,197,187,.5); }
.home-page .grad-pink {
  background: linear-gradient(100deg, var(--teal-deep) 10%, var(--teal) 55%, #0068B7);
  -webkit-background-clip: text; background-clip: text;
}
.home-page .btn-rainbow {
  background: var(--teal); color: #06302c;
  box-shadow: 0 8px 28px rgba(57,197,187,.34);
}
.home-page .btn-rainbow:hover {
  background: var(--teal-deep); color: #fff;
  box-shadow: 0 14px 38px rgba(22,143,132,.42);
}
.home-page .stamp.s-beta { color: var(--teal-deep); box-shadow: 0 4px 18px rgba(57,197,187,.22); }
.home-page .card-main { box-shadow: 0 0 0 1px rgba(255,255,255,.6), var(--shadow-lg), 0 0 40px rgba(57,197,187,.14); }
.home-page .sec .num { box-shadow: 0 4px 14px rgba(57,197,187,.30); }
.home-page .marquee-track i { background: var(--teal); box-shadow: 0 0 8px rgba(57,197,187,.8); }
.home-page .showcase-top-line {
  background: linear-gradient(90deg, transparent, var(--teal) 30%, var(--clr-b) 70%, transparent);
}
.home-page .stage-device::before { background: rgba(57,197,187,.06); border-color: rgba(57,197,187,.14); }
.home-page .phone-glow { background: radial-gradient(circle, rgba(57,197,187,.09) 0%, transparent 70%); }

/* -------- 响应式 -------- */
@media (max-width: 1020px) {
  .h-section { font-size: 46px; }
  .h-lead { font-size: 30px; }
  .hero { padding: 64px 0 44px; }
  .hero h1 { font-size: 60px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { height: 400px; margin-top: 8px; order: 0; }
  .showcase-inner { grid-template-columns: 1fr; }
  .stage-device { min-height: 340px; order: 0; }
  .about-grid { grid-template-columns: 1fr; }
  .privacy-band { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .h-section { font-size: 36px; }
  .h-lead { font-size: 26px; }
  .hero { padding: 44px 0 36px; }
  .hero h1 { font-size: 44px; }
  .hero-visual { height: 340px; }
  .section { padding: 70px 0; }
  .lede { font-size: 16px; }
  .marquee-track span { font-size: 22px; }
  .statement-body { font-size: 17px; }
  .feature-grid { grid-template-columns: 1fr; }
  .milestone-strip { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .pband-content { flex-direction: column; align-items: flex-start; }
  .stamp { width: 88px; height: 88px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 36px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .privacy-band h2 { font-size: 34px; }
}