/* ============================================
   爱云发科技 · Design System v2（深色科技精修）
   加载顺序：main.css 之后，仅改版页面引用
   ============================================ */

:root {
  --v2-bg: #070a14;
  --v2-bg-soft: #0b1020;
  --v2-surface: rgba(255, 255, 255, 0.03);
  --v2-surface-2: rgba(255, 255, 255, 0.055);
  --v2-border: rgba(255, 255, 255, 0.08);
  --v2-border-glow: rgba(0, 212, 255, 0.35);
  --v2-cyan: #00d4ff;
  --v2-blue: #3b82f6;
  --v2-purple: #8b5cf6;
  --v2-text: #eef2ff;
  --v2-text-2: #aab4d4;
  --v2-text-3: #6b7599;
  --v2-grad: linear-gradient(100deg, #00d4ff 0%, #3b82f6 45%, #8b5cf6 100%);
  --v2-grad-soft: linear-gradient(100deg, rgba(0,212,255,.14), rgba(59,130,246,.14), rgba(139,92,246,.14));
  --v2-radius: 18px;
  --v2-radius-sm: 12px;
  --v2-shadow: 0 24px 70px rgba(2, 6, 23, 0.55);
  --v2-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 全局基底 ---------- */
body {
  background: var(--v2-bg);
  color: var(--v2-text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  /* 全场极光氛围 */
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(139, 92, 246, 0.16), transparent 60%),
    radial-gradient(800px 480px at 8% 12%, rgba(0, 212, 255, 0.12), transparent 60%),
    radial-gradient(700px 600px at 50% 110%, rgba(59, 130, 246, 0.10), transparent 60%),
    var(--v2-bg);
  pointer-events: none;
}

::selection { background: rgba(0, 212, 255, 0.28); }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(120, 140, 200, 0.25); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 212, 255, 0.4); }

/* ---------- 玻璃吸顶导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(7, 10, 20, 0.72);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid var(--v2-border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.08rem;
  color: var(--v2-text);
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.logo img { border-radius: 9px; }
.logo .sub {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--v2-text-3);
  letter-spacing: 0.12em;
  margin-left: 2px;
}
.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-desktop a {
  position: relative;
  padding: 8px 14px;
  font-size: 0.92rem;
  color: var(--v2-text-2);
  text-decoration: none;
  border-radius: 999px;
  transition: color 0.25s, background 0.25s;
  white-space: nowrap;
}
.nav-desktop a:hover { color: var(--v2-text); background: var(--v2-surface-2); }
.nav-desktop a.active {
  color: var(--v2-text);
  background: var(--v2-grad-soft);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.25);
}
.nav-cta {
  margin-left: 10px;
  padding: 8px 18px !important;
  font-weight: 700;
  color: #06101f !important;
  background: var(--v2-grad) !important;
  box-shadow: 0 6px 24px rgba(0, 212, 255, 0.35);
}
.nav-cta:hover { transform: translateY(-1px); }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--v2-text);
  background: var(--v2-surface-2);
  border: 1px solid var(--v2-border);
  border-radius: 12px;
  cursor: pointer;
}
.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 10px 16px 18px;
  gap: 4px;
  background: rgba(7, 10, 20, 0.96);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--v2-border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 13px 14px;
  min-height: 44px;
  display: flex;
  align-items: center;
  color: var(--v2-text-2);
  text-decoration: none;
  font-size: 1rem;
  border-radius: 12px;
}
.nav-mobile a.active, .nav-mobile a:active {
  color: var(--v2-text);
  background: var(--v2-grad-soft);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.25s var(--v2-ease), box-shadow 0.25s, background 0.25s, border-color 0.25s;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  color: #06101f;
  background: var(--v2-grad);
  box-shadow: 0 10px 34px rgba(0, 212, 255, 0.35), inset 0 1px 0 rgba(255,255,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 44px rgba(0, 212, 255, 0.5); }
.btn-outline {
  color: var(--v2-text);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
}
.btn-outline:hover { box-shadow: inset 0 0 0 1px var(--v2-border-glow); background: var(--v2-surface-2); }
.btn-lg { padding: 15px 36px; font-size: 1.06rem; min-height: 52px; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 24px; position: relative; }
.container { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-header h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 14px 0 12px;
}
.section-header p { color: var(--v2-text-2); font-size: 1.02rem; line-height: 1.75; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--v2-cyan);
  background: rgba(0, 212, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.28);
}
.text-gradient {
  background: var(--v2-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 36px; }

/* 滚动入场（配合 main.js 的 .animate-in） */
[data-animate] { opacity: 0; transform: translateY(28px); transition: opacity 0.8s var(--v2-ease), transform 0.8s var(--v2-ease); }
[data-animate].animate-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-animate] { opacity: 1; transform: none; transition: none; }
}

/* ---------- Hero ---------- */
.hero-home {
  position: relative;
  padding: clamp(84px, 12vw, 148px) 24px clamp(72px, 9vw, 120px);
  text-align: center;
  overflow: hidden;
}
.hero-home::before {
  /* 网格地板 */
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 255, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-home::after {
  content: '';
  position: absolute;
  left: 50%;
  top: -180px;
  width: 720px;
  height: 420px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(0, 212, 255, 0.22), rgba(139, 92, 246, 0.12), transparent);
  filter: blur(30px);
  pointer-events: none;
  animation: heroGlow 7s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  from { opacity: 0.75; transform: translateX(-50%) scale(1); }
  to { opacity: 1; transform: translateX(-50%) scale(1.08); }
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.hero-particle {
  position: absolute;
  bottom: -12px;
  border-radius: 50%;
  background: var(--v2-cyan);
  opacity: 0;
  animation: floatUp linear infinite;
}
@keyframes floatUp {
  0% { transform: translateY(0); opacity: 0; }
  12% { opacity: 0.7; }
  88% { opacity: 0.4; }
  100% { transform: translateY(-88vh); opacity: 0; }
}
.hero-content { position: relative; z-index: 1; max-width: 900px; margin: 0 auto; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--v2-text-2);
  background: var(--v2-surface-2);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  margin-bottom: 28px;
}
.hero-badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--v2-cyan);
  box-shadow: 0 0 12px var(--v2-cyan);
  animation: pulseDot 2.2s ease-in-out infinite;
}
@keyframes pulseDot { 50% { opacity: 0.35; } }
.hero-home h1 {
  font-size: clamp(2.3rem, 6.4vw, 4.4rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.22rem);
  color: var(--v2-text-2);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 36px;
}
.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-quote {
  margin: 44px auto 0;
  max-width: 620px;
  min-height: 66px;
  font-size: 0.98rem;
  font-style: italic;
  color: var(--v2-cyan);
  line-height: 1.8;
  transition: opacity 0.6s;
}
.hero-quote-fade { opacity: 0; }
.hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: 720px;
  margin: 60px auto 0;
}
.hero-stat {
  padding: 20px 12px;
  border-radius: var(--v2-radius-sm);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
}
.hero-stat .num {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  background: var(--v2-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stat .lab { font-size: 0.8rem; color: var(--v2-text-3); margin-top: 6px; }

/* ---------- Bento 卡片体系 ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}
.bento {
  position: relative;
  grid-column: span 4;
  padding: 30px 28px;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  overflow: hidden;
  transition: transform 0.35s var(--v2-ease), box-shadow 0.35s;
}
.bento::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 220px at var(--mx, 50%) var(--my, 0%), rgba(0, 212, 255, 0.09), transparent 65%);
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}
.bento:hover { transform: translateY(-4px); box-shadow: inset 0 0 0 1px var(--v2-border-glow), var(--v2-shadow); }
.bento:hover::before { opacity: 1; }
.bento .b-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  border-radius: 14px;
  background: var(--v2-grad-soft);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.22);
  margin-bottom: 18px;
}
.bento h3 { font-size: 1.14rem; font-weight: 800; margin: 0 0 10px; color: var(--v2-text); }
.bento p { font-size: 0.92rem; color: var(--v2-text-2); line-height: 1.75; margin: 0; }
.bento .b-metric {
  font-size: 1.9rem;
  font-weight: 900;
  background: var(--v2-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}
.bento .b-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--v2-cyan);
  text-decoration: none;
}
.bento .b-link:hover { gap: 10px; }
.bento .b-link { transition: gap 0.25s; }

/* 产品阶梯卡 */
.tier-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tier-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  transition: transform 0.35s var(--v2-ease), box-shadow 0.35s;
  text-decoration: none;
}
.tier-card:hover { transform: translateY(-4px); box-shadow: inset 0 0 0 1px var(--v2-border-glow), var(--v2-shadow); }
.tier-card.hot {
  background: linear-gradient(170deg, rgba(0,212,255,0.10), rgba(139,92,246,0.10));
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.4), 0 18px 50px rgba(0, 212, 255, 0.12);
}
.tier-tag {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: 999px;
  color: #06101f;
  background: var(--v2-grad);
}
.tier-name { font-size: 1.05rem; font-weight: 800; color: var(--v2-text); margin-bottom: 6px; }
.tier-price { margin: 8px 0 12px; }
.tier-price .now { font-size: 1.75rem; font-weight: 900; color: var(--v2-text); }
.tier-price .now small { font-size: 0.85rem; font-weight: 600; color: var(--v2-text-3); }
.tier-price .was { font-size: 0.85rem; color: var(--v2-text-3); text-decoration: line-through; margin-left: 8px; }
.tier-desc { font-size: 0.86rem; color: var(--v2-text-2); line-height: 1.7; flex: 1; }
.tier-go { margin-top: 16px; font-size: 0.86rem; font-weight: 700; color: var(--v2-cyan); }

/* ---------- AI 问答 ---------- */
.ai-qa-section { padding: 96px 24px; background: linear-gradient(180deg, transparent, rgba(11, 16, 32, 0.7) 18%, rgba(11, 16, 32, 0.7) 82%, transparent); }
.qa-main-wrap {
  max-width: 975px;
  margin: 0 auto;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border), var(--v2-shadow);
  padding: 20px 22px;
}
.qa-main-chat { max-height: 420px; overflow-y: auto; display: none; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.qa-main-chat.open { display: flex; }
.chat-msg { max-width: 88%; padding: 8px 13px; border-radius: 12px; font-size: 0.88rem; line-height: 1.62; }
.chat-msg.user { align-self: flex-end; background: var(--v2-grad); color: #06101f; font-weight: 600; border-bottom-right-radius: 4px; }
.chat-msg.bot { align-self: flex-start; background: var(--v2-surface-2); color: var(--v2-text); box-shadow: inset 0 0 0 1px var(--v2-border); border-bottom-left-radius: 4px; }
.chat-followups { display: flex; flex-wrap: wrap; gap: 8px; }
.chat-followup-btn {
  padding: 8px 14px;
  font-size: 0.82rem;
  color: var(--v2-cyan);
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.25s;
}
.chat-followup-btn:hover { background: rgba(0, 212, 255, 0.15); }
.chat-ps { color: var(--v2-text-2); font-size: 0.85rem; }
.chat-ps a { color: var(--v2-cyan); }
.chat-lead-form { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.chat-lead-input {
  flex: 1; min-width: 120px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--v2-border);
  background: rgba(0,0,0,0.25);
  color: var(--v2-text);
  font-size: 0.86rem;
}
.chat-lead-submit {
  padding: 10px 18px;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  color: #06101f;
  background: var(--v2-grad);
  cursor: pointer;
}
.chat-lead-done { color: #4ade80; font-size: 0.88rem; }

.qa-onboard { display: flex; flex-direction: column; gap: 14px; }
.onboard-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.onboard-tag { font-size: 0.85rem; color: var(--v2-text-3); min-width: 40px; }
.onboard-row button {
  min-height: 38px;
  padding: 8px 15px;
  font-size: 0.86rem;
  color: var(--v2-text-2);
  background: var(--v2-surface-2);
  border: 1px solid var(--v2-border);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.22s;
}
.onboard-row button:hover { border-color: var(--v2-border-glow); color: var(--v2-text); }
.onboard-row button.selected { color: #06101f; font-weight: 700; background: var(--v2-grad); border-color: transparent; }
.onboard-industry-input {
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--v2-border-glow);
  background: rgba(0,0,0,0.3);
  color: var(--v2-text);
  font-size: 0.86rem;
  outline: none;
}
.onboard-questions { display: flex; flex-wrap: wrap; gap: 8px; }
.onboard-label-sel { width: 100%; font-size: 0.82rem; color: var(--v2-text-3); }
.qa-hero-input { display: flex; gap: 10px; margin-top: 18px; }
.qa-hero-input input {
  flex: 1;
  min-height: 50px;
  padding: 13px 20px;
  font-size: 0.95rem;
  color: var(--v2-text);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--v2-border);
  border-radius: 999px;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.qa-hero-input input:focus { border-color: var(--v2-cyan); box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.12); }
.qa-hero-input button {
  min-height: 50px;
  padding: 0 28px;
  border: none;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 800;
  color: #06101f;
  background: var(--v2-grad);
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.25s;
}
.qa-hero-input button:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(0, 212, 255, 0.4); }
.qa-hot-tags { max-width: 780px; margin: 22px auto 0; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.qa-hot-label { font-size: 0.85rem; color: var(--v2-text-3); padding: 7px 0; }
.qa-hot-tags a {
  font-size: 0.83rem;
  color: var(--v2-text-2);
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  cursor: pointer;
  transition: all 0.22s;
}
.qa-hot-tags a:hover { color: var(--v2-cyan); box-shadow: inset 0 0 0 1px var(--v2-border-glow); }
.qa-grid { max-width: 1100px; margin: 40px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.qa-card {
  padding: 22px;
  border-radius: var(--v2-radius-sm);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  cursor: pointer;
  transition: transform 0.3s var(--v2-ease), box-shadow 0.3s;
}
.qa-card:hover { transform: translateY(-3px); box-shadow: inset 0 0 0 1px var(--v2-border-glow); }
.qa-card-q { font-weight: 700; font-size: 0.95rem; color: var(--v2-text); margin-bottom: 10px; }
.qa-card-a { font-size: 0.85rem; color: var(--v2-text-2); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.qa-card-meta { display: flex; gap: 12px; margin-top: 12px; font-size: 0.76rem; color: var(--v2-text-3); }

/* ---------- 创始人 ---------- */
.profile-grid { display: grid; grid-template-columns: 340px 1fr; gap: 56px; align-items: center; max-width: 1000px; margin: 0 auto; }
.profile-img { position: relative; text-align: center; }
.profile-img::before {
  content: '';
  position: absolute;
  inset: -24px;
  background: radial-gradient(closest-side, rgba(0, 212, 255, 0.22), transparent);
  filter: blur(18px);
  z-index: -1;
}
.profile-img img {
  width: 100%;
  max-width: 300px;
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(2, 6, 23, 0.6), inset 0 0 0 1px var(--v2-border);
}
.profile-img .social { margin-top: 16px; font-size: 0.85rem; color: var(--v2-text-3); }
.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--v2-purple);
  background: rgba(139, 92, 246, 0.12);
  box-shadow: inset 0 0 0 1px rgba(139, 92, 246, 0.35);
  margin-bottom: 14px;
}

/* ---------- 信任条（保留兼容） ---------- */
.trust-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; max-width: 1000px; margin: 0 auto; padding: 0 24px; }
.trust-item {
  text-align: center;
  padding: 26px 14px;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
}
.trust-icon { font-size: 1.4rem; margin-bottom: 8px; }
.stat-num {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  background: var(--v2-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label { font-size: 0.82rem; color: var(--v2-text-3); margin-top: 6px; }

/* ---------- 案例卡（兼容原类名） ---------- */
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.result-card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  transition: transform 0.35s var(--v2-ease), box-shadow 0.35s;
  overflow: hidden;
}
.result-card:hover { transform: translateY(-4px); box-shadow: inset 0 0 0 1px var(--v2-border-glow), var(--v2-shadow); }
.result-card.featured {
  background: linear-gradient(170deg, rgba(0,212,255,0.10), rgba(139,92,246,0.10));
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.4);
}
.result-icon { font-size: 1.8rem; margin-bottom: 14px; }
.result-metric { font-size: 1.05rem; font-weight: 700; color: var(--v2-text); margin-bottom: 10px; }
.result-metric span {
  font-size: 1.6rem;
  font-weight: 900;
  background: var(--v2-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 3px;
}
.result-desc { font-size: 0.88rem; color: var(--v2-text-2); line-height: 1.8; }

/* ---------- 诊断工具 ---------- */
.diagnosis-widget {
  max-width: 680px;
  margin: 0 auto;
  padding: 34px 30px;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border), var(--v2-shadow);
}
.diagnosis-step { display: none; }
.diagnosis-step.active { display: block; animation: stepIn 0.4s var(--v2-ease); }
@keyframes stepIn { from { opacity: 0; transform: translateX(18px); } to { opacity: 1; transform: none; } }
.diagnosis-step h4 { font-size: 1.12rem; color: var(--v2-text); margin: 0 0 18px; }
.diagnosis-options { display: grid; gap: 10px; }
.diagnosis-options button {
  min-height: 50px;
  padding: 13px 20px;
  text-align: left;
  font-size: 0.95rem;
  color: var(--v2-text-2);
  background: var(--v2-surface-2);
  border: 1px solid var(--v2-border);
  border-radius: var(--v2-radius-sm);
  cursor: pointer;
  transition: all 0.22s;
}
.diagnosis-options button:hover { border-color: var(--v2-cyan); color: var(--v2-text); background: rgba(0, 212, 255, 0.06); transform: translateX(4px); }
.diagnosis-result { text-align: center; }
.diagnosis-score {
  font-size: 3.2rem;
  font-weight: 900;
  background: var(--v2-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 14px 0;
}
.diagnosis-advice { color: var(--v2-text-2); line-height: 1.9; font-size: 0.95rem; max-width: 480px; margin: 0 auto 24px; }
.lead-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
.lead-input {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  border-radius: var(--v2-radius-sm);
  border: 1px solid var(--v2-border);
  background: rgba(0,0,0,0.28);
  color: var(--v2-text);
  font-size: 0.93rem;
  outline: none;
  box-sizing: border-box;
}
.lead-input:focus { border-color: var(--v2-cyan); }
.lead-msg { margin-top: 12px; font-size: 0.88rem; min-height: 20px; }
.lead-msg.success { color: #4ade80; }
.lead-msg.error { color: #f87171; }

/* ---------- 新闻卡 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.news-card {
  padding: 24px;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  transition: transform 0.3s var(--v2-ease), box-shadow 0.3s;
}
.news-card:hover { transform: translateY(-3px); box-shadow: inset 0 0 0 1px var(--v2-border-glow); }

/* ---------- 价值卡（探索更多） ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.value-card {
  display: block;
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
  text-decoration: none;
  transition: transform 0.35s var(--v2-ease), box-shadow 0.35s;
}
.value-card:hover { transform: translateY(-4px); box-shadow: inset 0 0 0 1px var(--v2-border-glow), var(--v2-shadow); }
.v-icon { font-size: 2rem; margin-bottom: 14px; }
.card {
  border-radius: var(--v2-radius);
  background: var(--v2-surface);
  box-shadow: inset 0 0 0 1px var(--v2-border);
}
.card-accent-top { position: relative; }
.card-accent-top::before {
  content: '';
  position: absolute;
  top: 0; left: 20%; right: 20%;
  height: 2px;
  background: var(--v2-grad);
  border-radius: 2px;
}

/* ---------- CTA ---------- */
.cta-section {
  position: relative;
  padding: 100px 24px;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(700px 320px at 50% 120%, rgba(0, 212, 255, 0.16), transparent 70%);
  pointer-events: none;
}
.cta-section h2 { font-size: clamp(1.7rem, 3.8vw, 2.6rem); font-weight: 900; margin: 0 0 14px; }
.cta-section p { color: var(--v2-text-2); font-size: 1.05rem; margin-bottom: 32px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--v2-border); background: rgba(5, 8, 16, 0.8); padding: 56px 24px 28px; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1.2fr 2fr; gap: 40px; }
.footer-inner > *, .footer-links > * { min-width: 0; }
.footer-brand .logo-text { font-size: 1.25rem; font-weight: 800; margin-bottom: 10px; }
.footer-brand p { color: var(--v2-text-3); font-size: 0.88rem; }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.footer-links .col { display: flex; flex-direction: column; gap: 10px; }
.footer-links strong { font-size: 0.9rem; color: var(--v2-text); margin-bottom: 4px; }
.footer-links a { font-size: 0.86rem; color: var(--v2-text-3); text-decoration: none; transition: color 0.22s; }
.footer-links a:hover { color: var(--v2-cyan); }
.footer-social { max-width: 1100px; margin: 36px auto 0; padding-top: 22px; border-top: 1px solid var(--v2-border); display: flex; gap: 14px; justify-content: center; font-size: 0.85rem; color: var(--v2-text-2); flex-wrap: wrap; }
.footer-social .sep { color: var(--v2-text-3); }
.footer-bottom { text-align: center; margin-top: 18px; font-size: 0.8rem; color: var(--v2-text-3); }

/* ---------- 马维斯：FAB + 抽屉（默认收起） ---------- */
.chat-bubble {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 400;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 52px;
  padding: 12px 20px 12px 14px;
  border: none;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
  color: #06101f;
  background: var(--v2-grad);
  box-shadow: 0 12px 36px rgba(0, 212, 255, 0.45);
  cursor: pointer;
  transition: transform 0.25s var(--v2-ease), box-shadow 0.25s;
  animation: fabPulse 3.2s ease-in-out infinite;
}
.chat-bubble:hover { transform: translateY(-2px) scale(1.03); }
.chat-bubble.hidden { display: none; }
.chat-bubble-icon img { border-radius: 50%; }
@keyframes fabPulse {
  0%, 100% { box-shadow: 0 12px 36px rgba(0, 212, 255, 0.45); }
  50% { box-shadow: 0 12px 44px rgba(139, 92, 246, 0.55); }
}
.chat-widget {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 401;
  width: 340px;
  max-width: calc(100vw - 44px);
  height: min(540px, calc(100vh - 120px));
  display: flex;
  flex-direction: column;
  border-radius: 20px;
  overflow: hidden;
  background: #0b1020;
  box-shadow: inset 0 0 0 1px var(--v2-border), 0 32px 90px rgba(2, 6, 23, 0.75);
  opacity: 0;
  transform: translateY(16px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.3s var(--v2-ease), transform 0.3s var(--v2-ease);
}
.chat-widget.open { opacity: 1; transform: none; pointer-events: auto; }
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  font-weight: 800;
  color: #06101f;
  background: var(--v2-grad);
}
.chat-header button { color: #06101f; }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.chat-input-wrap { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--v2-border); }
.chat-input-wrap input {
  flex: 1;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--v2-border);
  background: rgba(0,0,0,0.3);
  color: var(--v2-text);
  font-size: 0.9rem;
  outline: none;
}
.chat-input-wrap button {
  width: 44px; height: 44px;
  border: none;
  border-radius: 50%;
  color: #06101f;
  font-size: 1rem;
  background: var(--v2-grad);
  cursor: pointer;
}
.chat-onboard { padding: 0 16px 12px; }

/* ---------- 移动端 ---------- */
@media (max-width: 960px) {
  .tier-grid { grid-template-columns: repeat(2, 1fr); }
  .qa-grid, .result-grid, .grid-3, .news-grid { grid-template-columns: 1fr 1fr; }
  .profile-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .profile-img img { max-width: 240px; }
}
@media (max-width: 860px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: flex; }
  .section { padding: 64px 18px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 44px; }
  .trust-bar { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .tier-grid, .qa-grid, .result-grid, .grid-3, .news-grid { grid-template-columns: 1fr; }
  .bento { grid-column: span 12; }
  .hero-ctas .btn { width: 100%; max-width: 320px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-links { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
  .lead-form-row { grid-template-columns: 1fr; }
  .chat-widget {
    right: 0; left: 0; bottom: 0;
    width: 100%;
    max-width: 100%;
    height: 38vh;
    border-radius: 20px 20px 0 0;
  }
  .chat-bubble { right: 16px; bottom: 16px; }
  .qa-main-wrap { padding: 18px; }
}
@media (max-width: 400px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ══════════════════════════════════════════════
   v3 设计增强层 (2026-08-23) — 全站生效
   DNA不变：深空蓝黑 + 电光青→蓝→紫；升级：层次/微交互/质感
   ══════════════════════════════════════════════ */

/* ── 1. 卡片体系：悬浮升起+边框流光 ── */
.card, .tier-card, .result-card, .value-card, .news-card {
  transition: transform .35s cubic-bezier(.22,.68,.4,1), box-shadow .35s, border-color .35s;
}
.card:hover, .tier-card:hover, .result-card:hover, .value-card:hover, .news-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 18px 48px -14px rgba(34,211,238,.16), 0 8px 24px -12px rgba(139,92,246,.14);
}
.tier-card.hot, .card-accent-top { position: relative; overflow: hidden; }
.tier-card.hot::before, .card-accent-top::before {
  content: ''; position: absolute; inset: 0; padding: 1px; border-radius: inherit;
  background: linear-gradient(120deg, rgba(34,211,238,.65), rgba(139,92,246,.55), transparent 42%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none; opacity:.85;
}

/* ── 2. 主按钮：光泽扫过 ── */
.btn-primary { position: relative; overflow: hidden; }
.btn-primary::after {
  content: ''; position: absolute; top: 0; left: -80%; width: 50%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,.28), transparent);
  transform: skewX(-20deg); transition: left .6s ease;
}
.btn-primary:hover::after { left: 130%; }

/* ── 3. 表单聚焦光晕 ── */
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--v2-cyan, #22d3ee) !important;
  box-shadow: 0 0 0 3px rgba(34,211,238,.16), 0 0 24px -6px rgba(34,211,238,.3);
}

/* ── 4. 子页统一页头节奏 ── */

/* ── 5. 滚动入场防闪现 ── */
[data-animate] { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,.68,.4,1); }
[data-animate].animate-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { [data-animate] { opacity:1; transform:none; transition:none; } }

/* ── 6. 品牌细节：选中/滚动条/焦点环 ── */
::selection { background: rgba(34,211,238,.28); color: #fff; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #0a0f1e; }
::-webkit-scrollbar-thumb { background: linear-gradient(#164e63,#1e3a8a); border-radius: 6px; border: 2px solid #0a0f1e; }
::-webkit-scrollbar-thumb:hover { background: linear-gradient(#0e7490,#3730a3); }

/* ── 7. 导航当前页强化 ── */
.nav-desktop a.active { color: var(--v2-cyan, #22d3ee); position: relative; }
.nav-desktop a.active::after { content:''; position:absolute; left:15%; right:15%; bottom:-6px; height:2px;
  border-radius:2px; background: linear-gradient(90deg,#22d3ee,#8b5cf6); }

/* ── 8. 图片媒体质感 ── */
img[loading="lazy"] { background: linear-gradient(110deg,#0f172a 30%,#1e293b 50%,#0f172a 70%); background-size:200% 100%; animation: shimmer 1.4s infinite; }
@keyframes shimmer { to { background-position:-200% 0; } }

/* ── 9. 移动端打磨：触控目标与间距 ── */
@media (max-width: 768px) {
  .nav-mobile a { padding: 13px 20px; }           /* 触控目标≥44px */
  .btn { min-height: 44px; }
  .section { padding-left: 18px; padding-right: 18px; }
  .quote-card { cursor: pointer; }
}

/* ════════════════════════════════════
   v4 Banner 重构 (2026-08-23晚)
   移动端彻底上下式：无左右并排，大字大留白易读
   ════════════════════════════════════ */
@media (max-width: 768px) {
  .hero-home { padding-top: calc(var(--header-height, 64px) + 34px); }
  .hero-home .hero-content { padding: 0 22px; text-align: center; }
  .hero-home h1 { font-size: 2.45rem !important; line-height: 1.16 !important; letter-spacing: -0.02em !important; }
  .hero-home .hero-sub { font-size: 1.04rem !important; line-height: 1.75 !important; margin-top: 16px !important; }
  /* CTA 全宽堆叠 — 告别左右并排 */
  .hero-ctas { display: flex !important; flex-direction: column !important; gap: 12px !important; max-width: 340px; margin: 26px auto 0 !important; }
  .hero-ctas .btn { width: 100% !important; margin: 0 !important; }
  .hero-quote { margin-top: 24px !important; }
  /* 数据条：2x2 网格 → 单行玻璃横幅 */
  .hero-stats {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 0 !important;
    margin: 30px 14px 0 !important;
    padding: 4px 0;
    background: rgba(15, 23, 42, .55);
    border: 1px solid rgba(148, 163, 184, .13);
    border-radius: 18px;
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  }
  .hero-stat { padding: 15px 4px; border-left: 1px solid rgba(148,163,184,.09); }
  .hero-stat:first-child { border-left: none; }
  .hero-stat .num { font-size: 1.38rem !important; }
  .hero-stat .lab { font-size: .66rem !important; letter-spacing: .02em; }

  /* ── 马维斯窗口移动端：整体≥50vh（结构不动，稳定不晃）── */
  .ai-qa-section .qa-main-wrap { min-height: 50vh; }


}