/* ============================================================
   智数盒子官网 · 组件库
   按钮 / 卡片 / 徽章 / 导航 / 页脚 / 价格卡 / 步骤 / 手风琴
   ============================================================ */

/* ============================================================
   0. 图标（替换 emoji 的 inline SVG 引用）
   ============================================================ */
.icon {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  vertical-align: -0.2em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.icon--lg { width: 1.6em; height: 1.6em; vertical-align: -0.25em; }
.icon--xl { width: 2em; height: 2em; vertical-align: -0.3em; }

/* ============================================================
   0.1 浏览器框截图占位（专业官网必备）
   ============================================================ */
.browser-frame {
  background: #fff;
  border: 1px solid var(--border-1);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  position: relative;
}
.browser-frame__bar {
  background: var(--bg-soft);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-1);
  display: flex;
  align-items: center;
  gap: 6px;
}
.browser-frame__dots {
  display: flex;
  gap: 5px;
  margin-right: 12px;
}
.browser-frame__dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #CBD5E1;
}
.browser-frame__url {
  flex: 1;
  background: #fff;
  border: 1px solid var(--border-1);
  border-radius: var(--radius-pill);
  padding: 3px 12px;
  font-size: 11px;
  color: var(--text-4);
  font-family: var(--font-mono);
  max-width: 280px;
}
 .browser-frame__body {
   min-height: 240px;
   background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
   display: flex;
   align-items: center;
   justify-content: center;
   flex-direction: column;
   padding: var(--sp-6);
   color: var(--text-4);
   font-size: 13px;
   position: relative;
   overflow: hidden;
 }
 .browser-frame__body svg { width: 36px; height: 36px; margin-bottom: var(--sp-2); opacity: 0.4; color: var(--brand-primary); }
 .browser-frame__label { font-size: 12px; color: var(--text-4); margin-top: 4px; }
 /* mock 数据线（让占位更像真实截图）*/
 .browser-frame__body::after {
   content: '';
   position: absolute;
   inset: 0;
   background-image: repeating-linear-gradient(180deg,
     transparent 0px, transparent 27px,
     rgba(37, 99, 235, 0.04) 27px, rgba(37, 99, 235, 0.04) 28px);
   pointer-events: none;
 }

/* 仪表盘 mock v2（更丰富、更像真实系统界面）*/
.dashboard-mock {
  background: #fff;
  display: grid;
  grid-template-columns: 68px 1fr;
  min-height: 360px;
  font-size: 10px;
}
.dashboard-mock__sidebar {
  background: var(--ink-900);
  padding: var(--sp-3) 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.dashboard-mock__logo-mini {
  width: 24px; height: 24px;
  margin: 0 auto var(--sp-2);
  background: var(--brand-primary);
  border-radius: 5px;
}
.dashboard-mock__nav-item {
  padding: 6px 8px;
  border-left: 2px solid transparent;
  color: rgba(255,255,255,0.45);
  font-size: 9px;
  line-height: 1.3;
  white-space: nowrap;
  transition: all 0.2s;
}
.dashboard-mock__nav-item--active {
  border-left-color: var(--brand-primary);
  color: #fff;
  background: rgba(37,99,235,0.18);
}
.dashboard-mock__main {
  display: flex;
  flex-direction: column;
  padding: var(--sp-3);
  gap: var(--sp-2);
}
.dashboard-mock__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--border-2);
}
.dashboard-mock__header-title { font-size: 12px; font-weight: 700; color: var(--text-1); }
.dashboard-mock__header-date { font-size: 9px; color: var(--text-4); }
.dashboard-mock__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.dashboard-mock__stat {
  background: var(--bg-soft);
  border-radius: var(--radius-xs);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  border: 1px solid var(--border-2);
}
.dashboard-mock__stat--blue { border-left: 3px solid var(--brand-primary); }
.dashboard-mock__stat--green { border-left: 3px solid var(--success); }
.dashboard-mock__stat--orange { border-left: 3px solid var(--warn); }
.dashboard-mock__stat--red { border-left: 3px solid var(--danger); }
.dashboard-mock__stat-label {
  font-size: 8px;
  color: var(--text-4);
  line-height: 1.2;
}
.dashboard-mock__stat-num {
  font-size: 14px;
  font-weight: 800;
  color: var(--text-1);
  line-height: 1.2;
}
.dashboard-mock__stat-change {
  font-size: 8px;
  font-weight: 600;
}
.dashboard-mock__stat-change--up { color: var(--success); }
.dashboard-mock__stat-change--down { color: var(--danger); }
.dashboard-mock__chart {
  background: var(--bg-soft);
  border-radius: var(--radius-xs);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-height: 80px;
}
.dashboard-mock__chart-title { font-size: 9px; font-weight: 600; color: var(--text-3); }
.dashboard-mock__bars {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: 5px;
}
.dashboard-mock__bar {
  flex: 1;
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-primary));
  border-radius: 2px 2px 0 0;
  opacity: 0.8;
}
.dashboard-mock__chart-labels {
  display: flex;
  gap: 5px;
}
.dashboard-mock__chart-labels span {
  flex: 1;
  text-align: center;
  font-size: 8px;
  color: var(--text-4);
}
.dashboard-mock__todo {
  background: var(--bg-soft);
  border-radius: var(--radius-xs);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.dashboard-mock__todo-title { font-size: 9px; font-weight: 600; color: var(--text-3); margin-bottom: 2px; }
.dashboard-mock__todo-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 9px;
  color: var(--text-2);
}
.dashboard-mock__todo-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dashboard-mock__todo-dot--red { background: var(--danger); }
.dashboard-mock__todo-dot--orange { background: var(--warn); }
.dashboard-mock__todo-dot--blue { background: var(--brand-primary); }

/* ============================================================
   0.2 信任数字带（Hero 下方）
   ============================================================ */
 .stat-band {
   background: var(--ink-900);
   border-top: none;
   border-bottom: 1px solid rgba(255,255,255,0.06);
   padding: var(--sp-8) 0;
   color: #fff;
 }
 .stat-band__grid {
   display: grid;
   grid-template-columns: repeat(4, 1fr);
   gap: var(--sp-4);
   text-align: center;
 }
 .stat-band__item {
   border-right: 1px solid rgba(255,255,255,0.08);
   padding: 0 var(--sp-3);
 }
 .stat-band__item:last-child { border-right: none; }
 .stat-band__num {
   font-size: clamp(28px, 3vw, 36px);
   font-weight: 800;
   color: #60A5FA;
   letter-spacing: -0.5px;
   line-height: 1;
   margin-bottom: var(--sp-2);
 }
 .stat-band__lbl {
   font-size: 13px;
   color: rgba(255,255,255,0.6);
   letter-spacing: 0.5px;
 }
 .stat-band__sub {
   font-size: 12px;
   color: rgba(255,255,255,0.35);
   margin-top: 2px;
 }
 @media (max-width: 768px) {
   .stat-band__grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
   .stat-band__item:nth-child(2) { border-right: none; }
}

/* ============================================================
   0.3 图文分栏（核心价值展示）
   ============================================================ */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: center;
  margin-bottom: var(--sp-16);
}
.feature-split--reverse { direction: rtl; }
.feature-split--reverse > * { direction: ltr; }
.feature-split__text h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--sp-3);
  color: var(--text-1);
}
.feature-split__text .lead {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: var(--sp-4);
}
.feature-split__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.feature-split__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: 14px;
  color: var(--text-2);
  padding: var(--sp-2) 0;
}
.feature-split__list li::before {
  content: '';
  width: 16px;
  height: 16px;
  background: var(--bg-tint-b);
  border: 1px solid var(--border-b);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
  position: relative;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%232563EB' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 10px;
}
.feature-split__visual { position: relative; }
@media (max-width: 900px) {
  .feature-split { grid-template-columns: 1fr; gap: var(--sp-6); margin-bottom: var(--sp-12); }
  .feature-split--reverse { direction: ltr; }
}

/* ============================================================
   0.4 客户证言卡
   ============================================================ */
.testimonial {
  background: #fff;
  border: 1px solid var(--border-1);
  border-radius: var(--radius);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}
.testimonial__quote {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-1);
  flex: 1;
  position: relative;
  padding-left: var(--sp-5);
}
.testimonial__quote::before {
  content: '"';
  position: absolute;
  left: 0;
  top: -8px;
  font-size: 40px;
  color: var(--border-1);
  font-family: Georgia, serif;
  line-height: 1;
}
.testimonial__meta {
  padding-top: var(--sp-3);
  border-top: 1px solid var(--border-2);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.testimonial__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}
.testimonial__name { font-size: 14px; font-weight: 600; color: var(--text-1); }
.testimonial__role { font-size: 12px; color: var(--text-4); }

/* ============================================================
   0.5 Hero 重设计（左文右图）
   ============================================================ */
.hero--split {
  background: var(--grad-hero-glow), var(--ink-900);
  color: #fff;
  padding: calc(var(--header-h) + var(--sp-16)) 0 var(--sp-16);
  position: relative;
  overflow: hidden;
}
.hero--split::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, #000 0%, transparent 80%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 80%);
}
.hero--split .container { position: relative; z-index: 1; }
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--sp-12);
  align-items: center;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #93C5FD;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: var(--sp-5);
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.15);
}
.hero__badge .icon { color: #60A5FA; }
.hero__title-lg {
  color: #fff;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 1px;
  margin-bottom: var(--sp-4);
}
.hero__tagline {
  font-size: clamp(18px, 2vw, 22px);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--sp-4);
  font-weight: 500;
}
.hero__value {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.8;
  margin-bottom: var(--sp-8);
  max-width: 480px;
}
.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
}
.hero__actions .btn--primary { padding: 14px 32px; font-size: 16px; }
.hero__link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  font-weight: 500;
}
.hero__link:hover { color: #fff; }
.hero__trust-mini {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}
.hero__trust-mini::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--success-l);
  border-radius: 50%;
  flex-shrink: 0;
}
.hero__visual { position: relative; }
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: var(--sp-8); }
  .hero__visual { order: -1; }
}

/* ============================================================
   1. 按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
  text-decoration: none;
  border: 2px solid transparent;
}
.btn--primary {
  background: var(--brand-primary);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn--primary:hover {
  background: var(--brand-primary-d);
  color: #fff;
  box-shadow: var(--shadow-blue-hover);
}
.btn--secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.18);
}
.btn--secondary:hover { background: rgba(255, 255, 255, 0.14); color: #fff; }
.btn--outline {
  background: #fff;
  color: var(--brand-primary);
  border-color: var(--border-b);
}
.btn--outline:hover { background: var(--bg-tint-b); color: var(--brand-primary-d); }
.btn--dark {
  background: var(--ink-800);
  color: #fff;
}
.btn--dark:hover { background: var(--ink-900); color: #fff; }
.btn--ghost { padding: 8px 16px; font-size: 14px; }
.btn--lg { padding: 16px 48px; font-size: 17px; }
.btn--block { display: flex; width: 100%; }

/* ============================================================
   2. 顶部导航
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: all var(--t);
  background: transparent;
}
/* 滚动后变白底毛玻璃（在 Hero 透明背景时显示白字，滚动后显示深字） */
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  box-shadow: 0 1px 0 var(--border-1), var(--shadow-sm);
}
.site-header .container {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

/* Logo */
.brand {
  grid-column: 1;
  justify-self: start;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 1px;
}
.brand__mark {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand__mark svg { width: 100%; height: 100%; }
.brand__mark svg { width: 22px; height: 22px; }
.brand__name { color: #fff; transition: color var(--t); }
.site-header.is-scrolled .brand__name { color: var(--text-1); }

/* 一级导航（居中） */
.nav {
  grid-column: 2;
  justify-self: center;
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
.nav__link {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  padding: 8px 0;
  position: relative;
  transition: color var(--t);
}
.nav__link::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 2px;
  background: var(--brand-primary);
  transform: scaleX(0);
  transition: transform var(--t);
}
.nav__link:hover { color: #fff; }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.site-header.is-scrolled .nav__link { color: var(--text-2); }
.site-header.is-scrolled .nav__link:hover,
.site-header.is-scrolled .nav__link.is-active { color: var(--brand-primary); }

/* CTA 按钮（绝对定位到右上角，避免影响导航居中） */
.nav__cta {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  margin-left: 0;
}

/* 移动端汉堡按钮 */
.menu-toggle {
  grid-column: 3;
  justify-self: end;
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
}
.menu-toggle svg { width: 22px; height: 22px; }
.site-header.is-scrolled .menu-toggle { color: var(--text-1); }
.menu-toggle { color: #fff; }

/* 移动端抽屉 */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-slow), visibility var(--t-slow);
  z-index: 99;
}
.drawer-overlay.is-open { opacity: 1; visibility: visible; }
.drawer {
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100vh;
  background: #fff;
  z-index: 101;
  transition: right var(--t-slow);
  overflow-y: auto;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
  padding: var(--sp-6);
}
.drawer.is-open { right: 0; }
.drawer__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
}
.drawer__close:hover { background: var(--bg-soft); color: var(--text-1); }
.drawer__nav { margin-top: var(--sp-8); display: flex; flex-direction: column; gap: 4px; }
.drawer__nav a {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-weight: 500;
  transition: all var(--t-fast);
}
.drawer__nav a:hover { background: var(--bg-tint-b); color: var(--brand-primary); }
.drawer__cta { margin-top: var(--sp-6); }

@media (max-width: 900px) {
  .site-header .container { grid-template-columns: 1fr auto; }
  .nav { display: none; }
  .menu-toggle { display: flex; grid-column: 2; }
  .nav__cta { display: none; }
}

/* ============================================================
   3. Hero（深色底 + 蓝色径向光晕 + 网格质感）
   ============================================================ */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(37, 99, 235, 0.18), transparent 70%),
    var(--ink-900);
  color: #fff;
  padding: calc(var(--header-h) + var(--sp-20)) 0 var(--sp-20);
  overflow: hidden;
}
.hero::before, .hero::after { display: none; }
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center top, rgba(0,0,0,0.8), transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center top, rgba(0,0,0,0.8), transparent 70%);
}
.hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
 .hero__logo {
   width: 56px;
   height: 56px;
   margin: 0 auto var(--sp-6);
 }
 .hero__logo svg { width: 100%; height: 100%; }
.hero__title {
  color: #fff;
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: var(--sp-4);
  line-height: 1.15;
}
.hero__slogan {
  font-size: clamp(17px, 2vw, 22px);
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: var(--sp-6);
  letter-spacing: 1px;
  font-weight: 400;
}
.hero__desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.9;
  margin-bottom: var(--sp-10);
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}
.hero__cta {
  display: flex;
  gap: var(--sp-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* 简化版（非首页用） */
.hero--sm { padding: calc(var(--header-h) + var(--sp-12)) 0 var(--sp-12); }
.hero--sm .hero__logo { width: 48px; height: 48px; margin-bottom: var(--sp-5); }
.hero--sm .hero__logo svg { width: 100%; height: 100%; }
.hero--sm .hero__title { font-size: clamp(26px, 3.5vw, 36px); letter-spacing: 1px; }
.hero--sm .hero__slogan { font-size: 16px; margin-bottom: var(--sp-3); color: rgba(255,255,255,0.55); }

/* ============================================================
   4. 卡片
   ============================================================ */
.card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  transition: all 0.3s var(--ease);
  box-shadow: var(--glass-shadow);
}
.card--hover:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.3);
  background: var(--glass-bg-strong);
}
.card--soft { background: var(--bg-soft); border-color: transparent; box-shadow: none; }
/* 语义色卡（降低饱和度，仅作背景区分，不抢眼）*/
.card--blue   { background: #F8FAFC; border-color: var(--border-1); }
.card--green  { background: #F8FAFC; border-color: var(--border-1); }
.card--orange { background: #F8FAFC; border-color: var(--border-1); }
.card--red    { background: #FEFAF9; border-color: #FECACA4D; }
.card--purple { background: #F8FAFC; border-color: var(--border-1); }
.card--dark   { background: var(--ink-800); color: #fff; border-color: transparent; }
.card--dark h4, .card--dark strong { color: #fff; }
.card--dark p { color: rgba(255, 255, 255, 0.7); }

/* 卡片图标：品牌蓝色调（科技感）*/
.card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-4);
  background: var(--bg-tint-b);
  color: var(--brand-primary);
  border: 1px solid var(--border-b);
}
.card__icon .icon { width: 22px; height: 22px; }
.card__icon--blue   { color: var(--brand-primary); }
.card__icon--green  { color: var(--success); background: var(--bg-tint-g); border-color: #BBF7D0; }
.card__icon--orange { color: var(--warn); background: var(--bg-tint-o); border-color: #FDE68A; }
.card__icon--red    { color: var(--danger); background: var(--bg-tint-r); border-color: #FECACA; }
.card__icon--purple, .card__icon--cyan, .card__icon--pink { color: var(--brand-primary); }
.card__title { font-size: 18px; font-weight: 700; color: var(--text-1); margin-bottom: var(--sp-2); }
.card__text { font-size: 14px; color: var(--text-3); line-height: 1.7; }
.card__title-lg { font-size: 20px; }

/* ============================================================
   5. 徽章 / 标签
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: var(--bg-tint-b);
  color: var(--brand-primary);
}
.badge--success { background: var(--bg-tint-g); color: var(--success); }
.badge--warn    { background: var(--bg-tint-o); color: var(--warn); }
.badge--danger  { background: var(--bg-tint-r); color: var(--danger); }
.badge--purple  { background: var(--bg-tint-p); color: var(--purple); }
.badge--dark    { background: var(--ink-800); color: #fff; }
.badge--outline { background: transparent; border: 1px solid currentColor; }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-tint-b);
  color: var(--brand-primary);
}

/* ============================================================
   6. 价格卡
   ============================================================ */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  align-items: stretch;
}
.price-card {
  background: #fff;
  border: 2px solid var(--border-1);
  border-radius: var(--radius-xl);
  padding: var(--sp-8) var(--sp-6);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all var(--t);
}
.price-card:hover { box-shadow: var(--shadow-md); }
.price-card--featured {
  border-color: var(--brand-primary);
  border-width: 2px;
  box-shadow: var(--shadow-md);
  z-index: 1;
}
.price-card--featured:hover { transform: translateY(-3px); }
.price-card__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-primary);
  color: #fff;
  padding: 5px 18px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
  white-space: nowrap;
}
.price-card__tier {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-1);
  text-align: center;
  margin-bottom: var(--sp-1);
}
.price-card__users {
  text-align: center;
  font-size: 14px;
  color: var(--text-3);
  margin-bottom: var(--sp-4);
}
.price-card__price { text-align: center; margin-bottom: var(--sp-5); }
.price-card__amount {
  font-size: 44px;
  font-weight: 800;
  color: var(--text-1);
  line-height: 1;
}
.price-card__unit {
  font-size: 14px;
  color: var(--text-4);
  margin-top: var(--sp-2);
}
.price-card__save {
  font-size: 13px;
  color: var(--success);
  font-weight: 600;
  margin-top: var(--sp-1);
}
.price-card__list { flex: 1; margin-bottom: var(--sp-5); }
.price-card__list li {
  font-size: 14px;
  color: var(--text-2);
  padding: 6px 0 6px 24px;
  position: relative;
}
.price-card__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success-l);
  font-weight: 700;
}
.price-card__btn { width: 100%; }
@media (max-width: 900px) {
  .price-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .price-card--featured { transform: none; }
  .price-card--featured:hover { transform: translateY(-3px); }
}

/* ============================================================
   7. 步骤条
   ============================================================ */
.steps {
  display: flex;
  gap: var(--sp-3);
  align-items: stretch;
}
.step {
  flex: 1;
  background: #fff;
  border: 1px solid var(--border-1);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  text-align: center;
  position: relative;
}
.step__num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--grad-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin: 0 auto var(--sp-3);
}
.step__title { font-size: 16px; font-weight: 700; color: var(--text-1); margin-bottom: var(--sp-2); }
.step__desc { font-size: 13px; color: var(--text-3); line-height: 1.6; }
@media (max-width: 768px) {
  .steps { flex-direction: column; }
}

/* ============================================================
   8. CTA 区（深色底 + 蓝色径向光晕，科技感）
   ============================================================ */
.cta-band {
  background:
    radial-gradient(ellipse 60% 80% at 50% 50%, rgba(37, 99, 235, 0.18), transparent 70%),
    var(--ink-900);
  color: #fff;
  padding: var(--sp-16) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before { display: none; }
.cta-band__inner { position: relative; z-index: 1; }
.cta-band__title {
  color: #fff;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  margin-bottom: var(--sp-3);
}
.cta-band__desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--sp-8);
}
.cta-band .btn--primary {
  background: #fff;
  color: var(--ink-900);
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.15);
}
.cta-band .btn--primary:hover {
  color: var(--ink-900);
  background: #F1F5F9;
  box-shadow: 0 6px 28px rgba(255, 255, 255, 0.22);
}

/* ============================================================
   9. 信任带
   ============================================================ */
.trust-band {
  background: var(--ink-900);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--border-on-dark);
}
.trust-band__inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--sp-8);
  flex-wrap: wrap;
  font-size: 14px;
  font-weight: 500;
}
.trust-band__item {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.trust-band__item::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--success-l);
  border-radius: 50%;
}

/* ============================================================
   10. 数字统计
   ============================================================ */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
}
.stat-card {
  background: #fff;
  border: 1px solid var(--border-1);
  border-radius: var(--radius);
  padding: var(--sp-5);
  text-align: center;
}
.stat-card__num {
  font-size: 32px;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1.1;
}
.stat-card__lbl {
  font-size: 12px;
  color: var(--text-3);
  margin-top: var(--sp-2);
  letter-spacing: 0.5px;
}
@media (max-width: 768px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }

/* ============================================================
   11. 手风琴（FAQ 用）
   ============================================================ */
.accordion { display: flex; flex-direction: column; gap: var(--sp-3); }
.accordion__item {
  background: #fff;
  border: 1px solid var(--border-1);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--t);
}
.accordion__item.is-open { border-color: var(--border-b); }
.accordion__q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-1);
  text-align: left;
  background: transparent;
  cursor: pointer;
}
.accordion__q:hover { color: var(--brand-primary); }
.accordion__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  color: var(--brand-primary);
  transition: transform var(--t);
}
.accordion__icon::before,
.accordion__icon::after {
  content: '';
  position: absolute;
  background: currentColor;
  border-radius: 2px;
}
.accordion__icon::before { top: 50%; left: 0; right: 0; height: 2px; transform: translateY(-50%); }
.accordion__icon::after  { left: 50%; top: 0; bottom: 0; width: 2px; transform: translateX(-50%); transition: transform var(--t); }
.accordion__item.is-open .accordion__icon::after { transform: translateX(-50%) scaleY(0); }
.accordion__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow);
}
.accordion__a-inner {
  padding: 0 var(--sp-6) var(--sp-5);
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
}

/* ============================================================
   12. 页脚
   ============================================================ */
.site-footer {
  background: var(--ink-900);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--sp-16) 0 var(--sp-8);
}
.site-footer a { color: rgba(255, 255, 255, 0.7); }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: var(--sp-10);
  margin-bottom: var(--sp-12);
}
.footer-brand .brand { margin-bottom: var(--sp-4); }
.footer-brand p { color: rgba(255, 255, 255, 0.5); font-size: 14px; line-height: 1.7; }
.footer-brand .footer-hooks { display: flex; gap: var(--sp-2); flex-wrap: wrap; margin-top: var(--sp-4); }
.footer-brand .footer-hook { font-size: 12px; color: rgba(255,255,255,0.55); background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); border-radius: 999px; padding: 3px 12px; }
.footer-col h5 { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: var(--sp-4); letter-spacing: 0.5px; }
.footer-col ul li { margin-bottom: var(--sp-3); font-size: 14px; }
.footer-contact p { font-size: 14px; color: rgba(255, 255, 255, 0.7); margin-bottom: var(--sp-3); }
.footer-contact strong { color: #fff; }
.footer-contact-row { display: flex; gap: var(--sp-5); align-items: flex-start; }
.footer-contact-info { font-size: 13px; line-height: 2.1; color: rgba(255,255,255,0.65); }
.footer-contact-info > div { display: flex; align-items: center; gap: 8px; }
.footer-contact-info svg { width: 14px; height: 14px; flex-shrink: 0; opacity: 0.6; }
.footer-contact-info a { color: rgba(255,255,255,0.85); font-weight: 600; }
.footer-contact-info a:hover { color: #fff; }
.footer-qr {
  width: 110px;
  height: 110px;
  background: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--sp-3);
  font-size: 11px;
  color: var(--text-3);
  text-align: center;
}
.footer-qr img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); }
.footer-bottom {
  width: 100%;
  padding-top: var(--sp-6);
  margin-top: var(--sp-12);
  border-top: 1px solid var(--border-on-dark);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
}
.footer-bottom span,
.footer-bottom a { display: block; margin: 0 auto 4px; }
.footer-bottom__legal { color: rgba(255,255,255,0.4); white-space: nowrap; }
.footer-bottom__legal + .footer-bottom__legal { margin-top: 2px; }
.footer-bottom__legal:hover { color: #fff; }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-6); }
  .footer-brand { grid-column: 1 / -1; }
}

/* ============================================================
   13. 悬浮咨询
   ============================================================ */
.floating-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.floating-cta__btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--grad-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--t);
}
.floating-cta__btn:hover { transform: scale(1.08); color: #fff; }
.floating-cta__btn svg { width: 24px; height: 24px; }
@media (max-width: 768px) {
  .floating-cta { right: 16px; bottom: 16px; }
  .floating-cta__btn { width: 48px; height: 48px; }
}

/* ============================================================
   0.1b 浏览器框 mock 数据行（替换"截图位"占位文字）
   ============================================================ */
.browser-frame__mock-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 6px 0;
  width: 100%;
  border-bottom: 1px solid var(--border-2);
}
.browser-frame__mock-row:last-child { border-bottom: none; }
.browser-frame__mock-tag {
  width: 60px; height: 10px;
  background: var(--border-1);
  border-radius: 2px;
  flex-shrink: 0;
}
.browser-frame__mock-bar {
  height: 8px;
  background: linear-gradient(90deg, var(--border-1), rgba(37,99,235,0.12));
  border-radius: 2px;
  flex: 1;
}
.browser-frame__mock-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success-l);
  flex-shrink: 0;
}

/* 正文关键数字高亮 */
.num { color: var(--brand-primary); font-weight: 700; }

/* 返回顶部 */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 80px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--ink-800);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--t);
  z-index: 90;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-md);
}
.back-to-top.is-visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--brand-primary); }
.back-to-top svg { width: 20px; height: 20px; }
@media (max-width: 768px) {
  .back-to-top { right: 16px; bottom: 72px; }
}

/* ============================================================
   科技感增强系统（光晕 / 玻璃 / 渐变 / 动效）
   ============================================================ */

/* --- 光晕装饰球（放在 section 背景里）--- */
.section--soft { position: relative; overflow: hidden; }
.section--soft::before {
  content: '';
  position: absolute;
  top: -15%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--glow-blue), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  animation: glow-drift 20s ease-in-out infinite alternate;
}
.section--soft::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--glow-purple), transparent 70%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 0;
  animation: glow-drift 25s ease-in-out infinite alternate-reverse;
}
.section--soft > * { position: relative; z-index: 1; }

@keyframes glow-drift {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(30px, 20px) scale(1.1); }
  100% { transform: translate(-20px, 10px) scale(0.95); }
}

/* --- 渐变文字 --- */
.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* --- Hero 增强光晕 --- */
.hero--split {
  background:
    radial-gradient(ellipse 60% 50% at 70% 20%, rgba(59, 130, 246, 0.15), transparent),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(124, 58, 237, 0.08), transparent),
    var(--grad-hero-glow),
    var(--ink-900);
}

/* --- 按钮：渐变 + 光晕 --- */
.btn--primary {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-d));
  box-shadow: var(--shadow-blue);
}
.btn--primary:hover {
  background: linear-gradient(135deg, var(--brand-primary-d), var(--brand-primary-x));
  box-shadow: var(--shadow-blue-hover);
  transform: translateY(-1px);
}

/* --- section-title 装饰线改为渐变 --- */
.section-head .section-title::after {
  background: var(--grad-primary);
  height: 4px;
  width: 48px;
  border-radius: 2px;
}

/* --- 滚动入场动画 --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- CTA band 增强光晕 --- */
.cta-band {
  background:
    radial-gradient(ellipse 50% 60% at 50% 40%, rgba(37, 99, 235, 0.25), transparent),
    radial-gradient(ellipse 40% 50% at 80% 60%, rgba(124, 58, 237, 0.10), transparent),
    var(--ink-900);
}

/* --- 卡片图标加发光 --- */
.card__icon {
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.12);
}

/* --- 价格卡 featured 增强 --- */
.price-card--featured {
  border-color: transparent;
  background:
    linear-gradient(var(--glass-bg-strong), var(--glass-bg-strong)) padding-box,
    var(--grad-primary) border-box;
  border: 2px solid transparent;
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(37, 99, 235, 0.1);
}

/* --- 悬浮咨询增强 --- */
.floating-cta__btn {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-d));
  box-shadow: var(--shadow-blue);
}
.floating-cta__btn:hover {
  box-shadow: var(--shadow-blue-hover);
  transform: scale(1.1);
}

/* --- 标签 badge 增强 --- */
.badge--blue {
  background: rgba(37, 99, 235, 0.1);
  color: var(--brand-primary);
  border: 1px solid rgba(37, 99, 235, 0.15);
}

/* --- 不支持 backdrop-filter 的 fallback --- */
@supports not (backdrop-filter: blur(1px)) {
  .card { background: #fff; }
}

/* --- 滚动条美化 --- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: rgba(37, 99, 235, 0.2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(37, 99, 235, 0.4); }

/* ============================================================
   Hero 截图 Tab 切换器
   ============================================================ */
.screenshot-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: var(--sp-3);
}
.screenshot-tab {
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.55);
  border: 1px solid rgba(255,255,255,0.12);
  transition: all var(--t-fast);
  cursor: pointer;
  white-space: nowrap;
}
.screenshot-tab:hover {
  background: rgba(255,255,255,0.14);
  color: rgba(255,255,255,0.9);
}
.screenshot-tab.is-active {
  background: var(--brand-primary);
  color: #fff;
  border-color: var(--brand-primary);
  box-shadow: 0 2px 10px rgba(37,99,235,0.35);
}
.screenshot-img {
  width: 100%;
  height: auto;
  display: block;
}
.screenshot-img[hidden] { display: none; }