/* ═══════════════════════════════════════════════════════════════
   HuanSoft 浣软科技 — 赛博霓虹主题样式表
   设计语言：平行四边形 · 霓虹辉光 · 赛博网格
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS 自定义属性 ─── */
:root {
  /* 霓虹色板 */
  --neon-cyan: #00f0ff;
  --neon-magenta: #ff00e4;
  --neon-purple: #b026ff;
  --neon-blue: #0066ff;
  --neon-green: #00ff88;

  --neon-cyan-glow: rgba(0, 240, 255, 0.4);
  --neon-magenta-glow: rgba(255, 0, 228, 0.4);
  --neon-purple-glow: rgba(176, 38, 255, 0.4);
  --neon-blue-glow: rgba(0, 102, 255, 0.4);
  --neon-green-glow: rgba(0, 255, 136, 0.4);

  /* 背景层级 */
  --bg-deep: #06060e;
  --bg-dark: #0a0a16;
  --bg-surface: #0f0f24;
  --bg-card: #12122a;
  --bg-glass: rgba(18, 18, 42, 0.7);
  --bg-glass-heavy: rgba(18, 18, 42, 0.92);

  /* 文字 */
  --text-primary: #e0e0ff;
  --text-secondary: #8888bb;
  --text-muted: #555580;
  --text-on-dark: #ffffff;

  /* 边框与辉光 */
  --border-subtle: rgba(0, 240, 255, 0.12);
  --border-glow: rgba(0, 240, 255, 0.25);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow-cyan: 0 0 10px rgba(0, 240, 255, 0.3), 0 0 30px rgba(0, 240, 255, 0.1);
  --shadow-glow-magenta: 0 0 10px rgba(255, 0, 228, 0.3), 0 0 30px rgba(255, 0, 228, 0.1);

  /* 导航 */
  --nav-bg: rgba(10, 10, 22, 0.85);
  --nav-height: 64px;

  /* 淡入 */
  --fade-duration: 0.6s;
}

/* 亮色模式 —— 保留霓虹感但提亮背景 */
[data-theme="light"] {
  --bg-deep: #e8e8f0;
  --bg-dark: #f0f0f8;
  --bg-surface: #f8f8ff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.8);
  --bg-glass-heavy: rgba(255, 255, 255, 0.95);
  --text-primary: #0a0a1a;
  --text-secondary: #444470;
  --text-muted: #8888aa;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
  --nav-bg: rgba(240, 240, 248, 0.85);
  --border-glow: rgba(0, 240, 255, 0.35);
}

/* ─── Reset & Base ─── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code",
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 等宽字体用于英文数字，中文用系统字体 */
code, pre, .mono {
  font-family: "JetBrains Mono", "Fira Code", monospace;
}

a {
  color: var(--neon-cyan);
  text-decoration: none;
  transition: all 0.25s ease;
}
a:hover {
  color: var(--neon-magenta);
  text-shadow: 0 0 8px var(--neon-magenta-glow);
}

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

/* ─── ═══ 工具类 ═══ ─── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

/* 斜切 section 分割 —
   奇数 section 右下斜，偶数 section 左下斜 */
.section-skew {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
  margin-bottom: -40px;
}
.section-skew + .section-skew {
  clip-path: polygon(0 40px, 100% 0, 100% 100%, 0 calc(100% - 40px));
  margin-top: -40px;
}

/* ─── ═══ 赛博网格背景图案 ═══ ─── */
.cyber-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.cyber-grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    /* 垂直网格线 */
    repeating-linear-gradient(
      to right,
      transparent,
      transparent 59px,
      rgba(0, 240, 255, 0.04) 59px,
      rgba(0, 240, 255, 0.04) 60px
    ),
    /* 水平网格线 */
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 59px,
      rgba(0, 240, 255, 0.04) 59px,
      rgba(0, 240, 255, 0.04) 60px
    );
}
[data-theme="light"] .cyber-grid::before {
  background-image:
    repeating-linear-gradient(to right, transparent, transparent 59px, rgba(0, 0, 0, 0.03) 59px, rgba(0, 0, 0, 0.03) 60px),
    repeating-linear-gradient(to bottom, transparent, transparent 59px, rgba(0, 0, 0, 0.03) 59px, rgba(0, 0, 0, 0.03) 60px);
}

/* ─── ═══ 扫描线动画 ═══ ─── */
.scan-line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
  box-shadow: 0 0 12px var(--neon-cyan), 0 0 24px var(--neon-cyan);
  opacity: 0.4;
  z-index: 1;
  animation: scan-move 6s ease-in-out infinite;
  pointer-events: none;
}

/* ─── ═══ Keyframes ═══ ─── */
@keyframes scan-move {
  0%   { top: -10px; opacity: 0; }
  5%   { opacity: 0.6; }
  50%  { opacity: 0.6; }
  55%  { opacity: 0; }
  100% { top: 110%; opacity: 0; }
}

@keyframes neon-pulse-cyan {
  0%, 100% { box-shadow: 0 0 6px rgba(0,240,255,0.3), 0 0 18px rgba(0,240,255,0.1); }
  50%      { box-shadow: 0 0 14px rgba(0,240,255,0.5), 0 0 36px rgba(0,240,255,0.2); }
}

@keyframes neon-pulse-magenta {
  0%, 100% { box-shadow: 0 0 6px rgba(255,0,228,0.3), 0 0 18px rgba(255,0,228,0.1); }
  50%      { box-shadow: 0 0 14px rgba(255,0,228,0.5), 0 0 36px rgba(255,0,228,0.2); }
}

@keyframes neon-pulse-purple {
  0%, 100% { box-shadow: 0 0 6px rgba(176,38,255,0.3), 0 0 18px rgba(176,38,255,0.1); }
  50%      { box-shadow: 0 0 14px rgba(176,38,255,0.5), 0 0 36px rgba(176,38,255,0.2); }
}

@keyframes breathe {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: skewX(-3deg) translateY(0); }
  50%      { transform: skewX(-3deg) translateY(-6px); }
}

@keyframes glitch {
  0%, 90%, 100% { transform: translate(0); }
  92% { transform: translate(-1px, 1px); }
  94% { transform: translate(1px, -1px); }
  96% { transform: translate(-1px, -1px); }
  98% { transform: translate(1px, 1px); }
}

/* ─── ═══ 淡入动画 ═══ ─── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--fade-duration) ease-out, transform var(--fade-duration) ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── ═══ Section 标题通用 ═══ ─── */
.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.6rem;
  text-align: center;
  color: var(--text-primary);
}
.section-title .highlight {
  color: var(--neon-cyan);
  text-shadow: 0 0 10px var(--neon-cyan-glow);
}
.section-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 3rem;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

/* 标题底部霓虹装饰线 */
.title-decor {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 2.5rem;
}
.title-decor span {
  display: block;
  width: 32px;
  height: 3px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan-glow);
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}
.title-decor span:nth-child(2) {
  width: 20px;
  background: var(--neon-magenta);
  box-shadow: 0 0 8px var(--neon-magenta-glow);
}
.title-decor span:nth-child(3) {
  width: 12px;
  background: var(--neon-purple);
  box-shadow: 0 0 8px var(--neon-purple-glow);
}

/* ─── ═══════════════ 导航栏 ═══════════════ ─── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0.7rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  transition: background 0.35s ease, padding 0.35s ease;
  min-height: var(--nav-height);
}

.navbar.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.4rem 1.5rem;
  box-shadow: 0 1px 0 var(--border-subtle), 0 0 20px rgba(0, 240, 255, 0.05);
}

/* 导航底部霓虹线 */
.navbar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), transparent);
  opacity: 0.3;
}

/* Logo */
.navbar .logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  z-index: 2;
}
.navbar .logo:hover {
  color: var(--text-primary);
  text-shadow: 0 0 12px var(--neon-cyan-glow);
}
.navbar .logo .logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  box-shadow: 0 0 12px var(--neon-cyan-glow);
}

/* 导航链接 */
.navbar .nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
}

.navbar .nav-links a {
  display: block;
  padding: 0.45rem 1.1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  transition: all 0.25s ease;
  position: relative;
}
.navbar .nav-links a:hover {
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.05);
  text-shadow: 0 0 6px var(--neon-cyan-glow);
}
.navbar .nav-links a.active {
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.08);
  text-shadow: 0 0 8px var(--neon-cyan-glow);
  font-weight: 600;
}
.navbar .nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 6px;
  right: 6px;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan-glow);
}

/* 主题切换按钮 */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-subtle);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-secondary);
  background: var(--bg-glass);
  transition: all 0.25s ease;
  margin-left: 0.6rem;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}
.theme-toggle:hover {
  color: var(--neon-cyan);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 2;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* ─── ═══════════════ Hero 区域 ═══════════════ ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 5rem;
  background: linear-gradient(135deg, var(--bg-deep) 0%, #0d0d24 40%, #0a0a30 70%, var(--bg-deep) 100%);
  color: var(--text-on-dark);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 60px), 0 100%);
  margin-bottom: -60px;
}

/* Hero 额外紫色辉光 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 25% 50%, rgba(176, 38, 255, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 75% 50%, rgba(0, 240, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

/* ─── 赛博干扰抖动 H1 ─── */
.hero h1.glitch-title {
  font-size: clamp(2.5rem, 7vw, 4.2rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
  text-shadow:
    0 0 10px rgba(0, 240, 255, 0.5),
    0 0 30px rgba(0, 240, 255, 0.2),
    0 0 60px rgba(176, 38, 255, 0.15);
  position: relative;
  animation: glitch-base 6s ease-in-out infinite;
}

/* RGB 分裂伪元素 —— 始终存在但默认透明，burst 时显现 */
.glitch-title::before,
.glitch-title::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.05s ease;
}

.glitch-title::before {
  color: var(--neon-cyan);
  clip-path: inset(0 0 60% 0);
  text-shadow: 2px 0 var(--neon-cyan), -1px 0 var(--neon-magenta);
}

.glitch-title::after {
  color: var(--neon-magenta);
  clip-path: inset(60% 0 0 0);
  text-shadow: -2px 0 var(--neon-magenta), 1px 0 var(--neon-cyan);
}

/* JS 触发的随机爆发 */
.glitch-burst::before,
.glitch-burst::after {
  opacity: 1;
}

.glitch-burst {
  animation: glitch-burst 0.3s ease-in-out !important;
}

/* 爆发态附加扫描干扰条 */
.glitch-burst::before {
  animation: glitch-scan-top 0.25s steps(2) infinite;
}
.glitch-burst::after {
  animation: glitch-scan-bot 0.2s steps(3) infinite;
}

/* ─── Keyframes ─── */

/* 基底微抖动 */
@keyframes glitch-base {
  0%, 85%, 100% { transform: translate(0) skewX(0deg); }
  87% { transform: translate(-0.5px, 0.3px) skewX(0.3deg); }
  89% { transform: translate(0.5px, -0.3px) skewX(-0.2deg); }
  91% { transform: translate(-0.3px, 0.5px) skewX(0.1deg); }
  93% { transform: translate(0, 0) skewX(0deg); }
}

/* 随机爆发抖动 */
@keyframes glitch-burst {
  0%   { transform: translate(0) skewX(0deg); }
  10%  { transform: translate(-3px, 1px) skewX(-1deg); }
  20%  { transform: translate(4px, -2px) skewX(1.5deg); }
  30%  { transform: translate(-5px, 1px) skewX(-1deg); }
  40%  { transform: translate(3px, 2px) skewX(0.5deg); }
  50%  { transform: translate(-2px, -3px) skewX(-1.5deg); }
  60%  { transform: translate(4px, -1px) skewX(1deg); }
  70%  { transform: translate(-3px, 2px) skewX(-0.5deg); }
  80%  { transform: translate(2px, -1px) skewX(0.3deg); }
  90%  { transform: translate(-1px, 0) skewX(-0.2deg); }
  100% { transform: translate(0) skewX(0deg); }
}

/* 上半扫描干扰 */
@keyframes glitch-scan-top {
  0%   { clip-path: inset(0 0 65% 0); transform: translate(2px, 0); }
  50%  { clip-path: inset(0 0 45% 0); transform: translate(-3px, 1px); }
  100% { clip-path: inset(0 0 55% 0); transform: translate(1px, 0); }
}

/* 下半扫描干扰 */
@keyframes glitch-scan-bot {
  0%   { clip-path: inset(55% 0 0 0); transform: translate(-2px, 0); }
  33%  { clip-path: inset(40% 0 0 0); transform: translate(3px, -1px); }
  66%  { clip-path: inset(70% 0 0 0); transform: translate(-1px, 0); }
  100% { clip-path: inset(50% 0 0 0); transform: translate(2px, 1px); }
}

/* ─── ═══ QR 弹窗动效 ═══ ─── */

/* 入场：弹性缩放 + 上移 */
@keyframes qr-modal-enter {
  0% {
    transform: scale(0.5) translateY(30px);
    opacity: 0;
  }
  60% {
    transform: scale(1.04) translateY(-3px);
    opacity: 1;
  }
  100% {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

/* 出场：缩小 + 下移 */
@keyframes qr-modal-exit {
  0% {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
  100% {
    transform: scale(0.6) translateY(20px);
    opacity: 0;
  }
}

/* 遮罩淡出 */
@keyframes qr-overlay-exit {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

.hero .subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  color: var(--neon-cyan);
  margin-bottom: 1rem;
  text-shadow: 0 0 12px var(--neon-cyan-glow);
  letter-spacing: 0.08em;
  font-weight: 600;
  min-height: 2em;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 轮播语句动画 */
.rotating-text {
  display: inline-block;
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.hero .tagline {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

/* Hero CTA 按钮 */
.hero .btn-primary {
  display: inline-block;
  padding: 0.85rem 2.8rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #fff;
  background: transparent;
  border: none;
  cursor: pointer;
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  position: relative;
  transition: all 0.3s ease;
  z-index: 1;
}
.hero .btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  z-index: -1;
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
}
.hero .btn-primary::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  z-index: -2;
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  filter: blur(8px);
  opacity: 0.5;
  animation: neon-pulse-cyan 2s ease-in-out infinite;
}
.hero .btn-primary:hover {
  transform: scale(1.04);
  color: #fff;
}

/* ─── ═══════════════ 次页 Hero ═══════════════ ─── */
.page-hero {
  padding: 6rem 1.5rem 3.5rem;
  background: linear-gradient(135deg, var(--bg-deep) 0%, #0d0d24 50%, var(--bg-deep) 100%);
  color: var(--text-on-dark);
  text-align: center;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
  margin-bottom: -30px;
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  position: relative;
  z-index: 1;
  text-shadow: 0 0 8px var(--neon-cyan-glow);
}
.page-hero .breadcrumb {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-top: 0.5rem;
  position: relative;
  z-index: 1;
}
.page-hero .breadcrumb a {
  color: var(--neon-cyan);
}
.page-hero .breadcrumb a:hover {
  color: var(--neon-magenta);
}

/* ─── ═══════════════ 卡片系统 ═══════════════ ─── */

/* 卡片网格布局 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* 斜切卡片外层 */
.skew-card {
  transform: skewX(-3deg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.skew-card:hover {
  transform: skewX(-3deg) translateY(-4px);
}

/* 斜切卡片内容回正 */
.skew-inner {
  transform: skewX(3deg);
}

/* 卡片基底 */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 1.8rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}
.card::after {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.15), var(--shadow-card);
}
.card:hover::after {
  opacity: 1;
}

/* 卡片图标 */
.card .card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: #fff;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}
.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ─── ═══════════════ 首页特色卡片 ═══════════════ ─── */
.features {
  text-align: center;
}

/* ─── ═══════════════ 首页快速链接 ═══════════════ ─── */
.quick-links {
  background: var(--bg-surface);
}

.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.quick-link-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.8rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  text-decoration: none;
  text-align: center;
  gap: 0.6rem;
  box-shadow: var(--shadow-card);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: all 0.3s ease;
}
.quick-link-card:hover {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.15), var(--shadow-card);
  transform: translateY(-3px);
  color: var(--text-primary);
}
.quick-link-card i {
  font-size: 1.8rem;
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan-glow);
}
.quick-link-card span {
  font-weight: 600;
  font-size: 0.95rem;
}

/* ─── ═══════════════ 关于我们 ═══════════════ ─── */
.about-content {
  max-width: 800px;
  margin: 0 auto;
}
.about-content p {
  margin-bottom: 1.3rem;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

/* 时间线 */
.timeline-item {
  border-left: 2px solid var(--neon-cyan);
  padding-left: 1.5rem;
  margin-bottom: 2rem;
  position: relative;
  box-shadow: -2px 0 8px rgba(0, 240, 255, 0.1);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 4px;
  width: 8px;
  height: 8px;
  background: var(--neon-cyan);
  clip-path: polygon(2px 0, 100% 0, calc(100% - 2px) 100%, 0 100%);
  box-shadow: 0 0 8px var(--neon-cyan-glow);
}
.timeline-item .timeline-date {
  font-size: 0.82rem;
  color: var(--neon-cyan);
  margin-bottom: 0.2rem;
  font-family: "JetBrains Mono", monospace;
}
.timeline-item .timeline-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.timeline-item .timeline-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.timeline-item.future {
  border-left-color: var(--border-subtle);
  opacity: 0.5;
}
.timeline-item.future::before {
  background: var(--text-muted);
  box-shadow: none;
}

/* ─── ═══════════════ 项目展示 ═══════════════ ─── */
.project-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.8rem 0 1rem;
}
.project-card .card-tags span {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border-subtle);
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.04);
  clip-path: polygon(3px 0, 100% 0, calc(100% - 3px) 100%, 0 100%);
}
.project-card .card-stars {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}
.project-card .card-stars i {
  color: var(--neon-magenta);
}
.project-card .card-link {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--neon-cyan);
  display: inline-block;
  margin-top: 0.5rem;
}
.project-card .card-link:hover {
  color: var(--neon-magenta);
}
.project-card .card-date {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-family: "JetBrains Mono", monospace;
}
.project-card .card-details {
  margin: 0.8rem 0 0.2rem;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-secondary);
}
.project-card .card-details strong {
  color: var(--neon-cyan);
  font-weight: 600;
}
.project-card .card-placeholder {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px dashed var(--border-subtle);
  clip-path: polygon(3px 0, 100% 0, calc(100% - 3px) 100%, 0 100%);
}

/* ─── ═══════════════ 团队成员 ═══════════════ ─── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.5rem;
}

.member-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.member-card .avatar-frame {
  width: 88px;
  height: 88px;
  margin: 0 auto 1rem;
  clip-path: polygon(16px 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.2);
}
.member-card .avatar-frame .avatar {
  width: 82px;
  height: 82px;
  clip-path: polygon(15px 0, 100% 0, calc(100% - 15px) 100%, 0 100%);
  object-fit: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  background: var(--bg-card);
}
.member-card .avatar-frame .avatar.initials {
  background: var(--bg-deep);
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan-glow);
}

.member-card .member-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  color: var(--text-primary);
}
.member-card .member-role {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}
.member-card .member-social {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
}
.member-card .member-social a {
  color: var(--text-muted);
  font-size: 1.05rem;
  transition: all 0.25s ease;
}
.member-card .member-social a:hover {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan-glow);
}

/* ─── ═══════════════ 联系方式 ═══════════════ ─── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
}

.contact-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
}

/* 各卡片不同辉光颜色 */
.contact-card.qq-group:hover {
  border-color: rgba(0, 255, 136, 0.4);
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.15), var(--shadow-card);
}
.contact-card.qq-channel:hover {
  border-color: rgba(0, 102, 255, 0.4);
  box-shadow: 0 0 24px rgba(0, 102, 255, 0.15), var(--shadow-card);
}
.contact-card.github:hover {
  border-color: rgba(176, 38, 255, 0.4);
  box-shadow: 0 0 24px rgba(176, 38, 255, 0.15), var(--shadow-card);
}
.contact-card.social:hover {
  border-color: rgba(255, 0, 228, 0.4);
  box-shadow: 0 0 24px rgba(255, 0, 228, 0.15), var(--shadow-card);
}

.contact-card .contact-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 1rem;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  transition: box-shadow 0.3s ease;
}
.contact-card .contact-icon.qq-group {
  background: linear-gradient(135deg, #00c853, #00e676);
  color: #fff;
  box-shadow: 0 0 12px rgba(0, 200, 83, 0.3);
}
.contact-card .contact-icon.qq-channel {
  background: linear-gradient(135deg, #2979ff, #448aff);
  color: #fff;
  box-shadow: 0 0 12px rgba(41, 121, 255, 0.3);
}
.contact-card .contact-icon.github {
  background: linear-gradient(135deg, #7c4dff, #b026ff);
  color: #fff;
  box-shadow: 0 0 12px rgba(176, 38, 255, 0.3);
}
.contact-card .contact-icon.social {
  background: linear-gradient(135deg, #e91e63, #ff00e4);
  color: #fff;
  box-shadow: 0 0 12px rgba(255, 0, 228, 0.3);
}

.contact-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}
.contact-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 1.2rem;
}

.contact-card .status-badge {
  display: inline-block;
  padding: 0.15rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 500;
  margin-bottom: 0.6rem;
  clip-path: polygon(3px 0, 100% 0, calc(100% - 3px) 100%, 0 100%);
}
.contact-card .status-badge.coming {
  border: 1px solid var(--neon-magenta);
  color: var(--neon-magenta);
  background: rgba(255, 0, 228, 0.06);
}
.contact-card .status-badge.ready {
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  background: rgba(0, 240, 255, 0.06);
}

/* ─── ═══════════════ 按钮系统 ═══════════════ ─── */
.btn-outline {
  display: inline-block;
  padding: 0.5rem 1.6rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--neon-cyan);
  background: transparent;
  border: 1px solid var(--border-glow);
  cursor: pointer;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  transition: all 0.25s ease;
}
.btn-outline:hover {
  background: rgba(0, 240, 255, 0.08);
  box-shadow: 0 0 14px var(--neon-cyan-glow);
  color: var(--neon-cyan);
}
.btn-outline.disabled {
  border-color: var(--text-muted);
  color: var(--text-muted);
  cursor: not-allowed;
  pointer-events: none;
  opacity: 0.5;
}

/* ─── ═══════════════ 页脚 ═══════════════ ─── */
.footer {
  background: var(--bg-deep);
  color: var(--text-secondary);
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  font-size: 0.86rem;
  position: relative;
  clip-path: polygon(0 30px, 100% 0, 100% 100%, 0 100%);
  margin-top: -30px;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), transparent);
  opacity: 0.3;
}

.footer .footer-brand {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  text-shadow: 0 0 6px var(--neon-cyan-glow);
}
.footer .footer-links {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin: 0.8rem 0;
  flex-wrap: wrap;
}
.footer .footer-links a {
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: all 0.25s ease;
}
.footer .footer-links a:hover {
  color: var(--neon-cyan);
  text-shadow: 0 0 10px var(--neon-cyan-glow);
}
.footer .footer-copy {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer .footer-copy a {
  color: var(--text-muted);
}
.footer .footer-copy a:hover {
  color: var(--neon-cyan);
}

/* ─── ═══════════════ QR 码模态框（全息动效版） ═══════════════ ─── */
.qr-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(6, 6, 14, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.qr-overlay.open {
  display: flex;
  opacity: 1;
}
/* 出场动效 */
.qr-overlay.closing {
  animation: qr-overlay-exit 0.35s ease forwards;
  pointer-events: none;
}

/* 弹窗本身 */
.qr-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  padding: 2rem 2rem 1.8rem;
  text-align: center;
  position: relative;
  max-width: 340px;
  width: 90%;
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  opacity: 0;
  transform: scale(0.85) translateY(20px);
  transition: none;
}
/* 入场动画 */
.qr-overlay.open .qr-modal {
  animation: qr-modal-enter 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
/* 出场动画 */
.qr-overlay.closing .qr-modal {
  animation: qr-modal-exit 0.35s cubic-bezier(0.55, 0, 0.9, 0.4) forwards;
}

/* 顶部霓虹渐变流光边框 */
.qr-modal::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-magenta), transparent);
}

/* QR 图片 */
.qr-modal img,
.qr-modal svg {
  width: 220px;
  height: 220px;
  object-fit: contain;
  display: block;
  margin: 0 auto 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
}

/* 平台名称 */
.qr-modal .qr-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
}

.qr-modal .qr-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* 关闭按钮 */
.qr-close {
  position: absolute;
  top: 10px;
  right: 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  transition: color 0.2s ease, text-shadow 0.2s ease;
  line-height: 1;
  z-index: 1;
}
.qr-close:hover {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan-glow);
}

/* ─── ═══════════════ 响应式 ═══════════════ ─── */

/* 平板及以下 */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .navbar .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-glass-heavy);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 0.8rem 1rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    gap: 0.1rem;
  }
  .navbar .nav-links.open {
    display: flex;
  }
  .navbar .nav-links a {
    padding: 0.7rem 1rem;
    width: 100%;
    clip-path: none;
  }
  .navbar .nav-links a.active::after {
    left: 0;
    right: 0;
  }

  .theme-toggle {
    margin-left: auto;
  }

  .section {
    padding: 3rem 0;
  }

  .section-skew {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 0 100%);
    margin-bottom: -20px;
  }
  .section-skew + .section-skew {
    clip-path: polygon(0 20px, 100% 0, 100% 100%, 0 calc(100% - 20px));
    margin-top: -20px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
  .team-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .quick-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
    margin-bottom: -30px;
  }
}

/* 手机 */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }
  .navbar {
    padding: 0.5rem 1rem;
  }
  .navbar.scrolled {
    padding: 0.35rem 1rem;
  }
  .hero {
    padding: 5rem 1rem 3.5rem;
  }
  .quick-links-grid {
    grid-template-columns: 1fr 1fr;
  }
  .team-grid {
    grid-template-columns: 1fr;
  }
  .page-hero {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 0 100%);
    margin-bottom: -20px;
  }
  .footer {
    clip-path: polygon(0 15px, 100% 0, 100% 100%, 0 100%);
    margin-top: -15px;
  }
}