/* ============================================================
   幂次智能官网 - 全局样式
   浅色现代风格 · 响应式 · 无构建工具
   ============================================================ */

:root {
  /* 品牌色 */
  --c-primary: #6c5ce7;
  --c-primary-dark: #5a4bd1;
  --c-blue: #3b82f6;
  --c-cyan: #06b6d4;

  /* 文字 */
  --c-text: #1e293b;
  --c-text-2: #475569;
  --c-text-3: #94a3b8;

  /* 背景 */
  --c-bg: #ffffff;
  --c-bg-soft: #f6f7fb;
  --c-bg-tint: #eef0fd;
  --c-border: #e6e8f0;

  /* 渐变 */
  --grad-primary: linear-gradient(135deg, #6c5ce7 0%, #3b82f6 100%);
  --grad-text: linear-gradient(120deg, #6c5ce7 10%, #3b82f6 55%, #06b6d4 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 10px rgba(30, 41, 59, 0.06);
  --shadow-md: 0 10px 30px rgba(30, 41, 59, 0.08);
  --shadow-lg: 0 24px 60px rgba(76, 81, 191, 0.14);

  /* 尺寸 */
  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 72px;

  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Hiragino Sans GB", "Segoe UI", Arial, sans-serif;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select { font-family: inherit; font-size: inherit; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 999px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 14px 34px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(99, 102, 241, 0.45);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: #fff;
  color: var(--c-primary);
  border: 1.5px solid rgba(108, 92, 231, 0.35);
}
.btn-ghost:hover {
  border-color: var(--c-primary);
  background: rgba(108, 92, 231, 0.06);
  transform: translateY(-2px);
}

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.header.scrolled {
  border-bottom-color: var(--c-border);
  box-shadow: 0 4px 20px rgba(30, 41, 59, 0.05);
}

.nav-wrap {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon { width: 36px; height: 36px; }
.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 14px;
  font-size: 15px;
  color: var(--c-text-2);
  border-radius: 8px;
  position: relative;
  transition: color 0.25s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-link:hover, .nav-link.active { color: var(--c-primary); }
.nav-link.active::after, .nav-link:hover::after { transform: scaleX(1); }
.nav-cta { margin-left: 10px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  width: 24px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--c-text);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 40px) 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, #f5f6ff 0%, #fbfbff 55%, #ffffff 100%);
}

.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  animation: blobFloat 12s ease-in-out infinite alternate;
}
.blob-1 {
  width: 520px; height: 520px;
  top: -140px; right: -100px;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.35), rgba(59, 130, 246, 0.12));
}
.blob-2 {
  width: 420px; height: 420px;
  bottom: -160px; left: -120px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.28), rgba(108, 92, 231, 0.1));
  animation-delay: -6s;
}
.blob-3 {
  width: 480px; height: 480px;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(108, 92, 231, 0.18), transparent 70%);
}
@keyframes blobFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, -30px) scale(1.08); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(108, 92, 231, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 92, 231, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(108, 92, 231, 0.09);
  border: 1px solid rgba(108, 92, 231, 0.22);
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero-badge::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad-primary);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(108, 92, 231, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(108, 92, 231, 0); }
}

.hero-title {
  font-size: clamp(32px, 4.6vw, 56px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 22px;
}

.hero-desc {
  font-size: 17px;
  color: var(--c-text-2);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 52px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 36px;
}
.stat-num {
  font-size: 34px;
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}
.stat-label {
  font-size: 13.5px;
  color: var(--c-text-3);
  margin-top: 2px;
}

/* Hero 轮播图 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-carousel {
  position: relative;
  width: 100%;
  max-width: 520px;
}
.carousel {
  position: relative;
  width: 100%;
  border-radius: 24px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(108, 92, 231, 0.15);
  box-shadow: var(--shadow-lg);
}
.carousel-track {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.65, 0, 0.35, 1);
}
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { width: 100%; height: auto; display: block; }

.carousel-dots {
  position: absolute;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: var(--shadow-sm);
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(108, 92, 231, 0.28);
  transition: all 0.3s ease;
}
.carousel-dot:hover { background: rgba(108, 92, 231, 0.5); }
.carousel-dot.active { width: 22px; background: var(--grad-primary); }

/* 悬浮标签点缀 */
.float-chip {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  animation: chipFloat 5s ease-in-out infinite alternate;
}
.chip-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad-primary);
}
.chip-1 { top: 7%; left: -34px; }
.chip-2 { bottom: 26%; right: -40px; animation-delay: -2.5s; }
.chip-3 { bottom: -18px; left: 12%; animation-delay: -1.2s; }
@keyframes chipFloat {
  from { transform: translateY(-7px); }
  to   { transform: translateY(9px); }
}

/* ---------- 通用 Section ---------- */
.section { padding: 100px 0; }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.section-tag {
  display: inline-block;
  padding: 6px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(108, 92, 231, 0.09);
  border-radius: 999px;
  margin-bottom: 18px;
}
.section-tag.light {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
}
.section-title {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.3;
}
.section-sub {
  margin-top: 14px;
  font-size: 17px;
  color: var(--c-text-2);
}

/* 图标配色 */
.icon-violet { color: #6c5ce7; background: rgba(108, 92, 231, 0.1); }
.icon-blue   { color: #3b82f6; background: rgba(59, 130, 246, 0.1); }
.icon-cyan   { color: #0891b2; background: rgba(6, 182, 212, 0.12); }

/* ---------- 关于我们 ---------- */
.about { background: var(--c-bg); }

.about-text {
  max-width: 860px;
  margin: 0 auto 48px;
  font-size: 17.5px;
  color: var(--c-text-2);
  text-align: center;
}
.about-text strong { color: var(--c-primary); font-weight: 700; }

.about-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.about-card {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.about-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 92, 231, 0.3);
}
.about-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.about-icon svg { width: 26px; height: 26px; }
.about-card h3 { font-size: 19px; margin-bottom: 8px; }
.about-card p { font-size: 15px; color: var(--c-text-2); }

/* ---------- 产品中心 ---------- */
.products { background: var(--c-bg-soft); }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  padding: 34px 30px;
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
  overflow: hidden;
}
.product-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(108, 92, 231, 0.25);
}
.product-card:hover::before { transform: scaleX(1); }

.product-card.featured {
  border-color: rgba(108, 92, 231, 0.35);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(180deg, #fdfdff 0%, #ffffff 100%);
}

.product-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.product-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-icon svg { width: 28px; height: 28px; }
.product-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(108, 92, 231, 0.09);
  padding: 4px 12px;
  border-radius: 999px;
}

.product-name { font-size: 22px; font-weight: 800; }
.product-slogan {
  font-size: 14px;
  color: var(--c-primary);
  font-weight: 600;
  margin: 6px 0 14px;
}
.product-desc {
  font-size: 15px;
  color: var(--c-text-2);
  margin-bottom: 20px;
}

.product-feats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 26px;
}
.product-feats li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--c-text);
}
.product-feats svg {
  width: 17px; height: 17px;
  flex-shrink: 0;
  color: var(--c-primary);
  background: rgba(108, 92, 231, 0.1);
  border-radius: 50%;
  padding: 2.5px;
}

.product-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-primary);
  transition: gap 0.25s;
}
.product-link svg { width: 18px; height: 18px; transition: transform 0.25s; }
.product-link:hover { gap: 10px; }
.product-link:hover svg { transform: translateX(2px); }

/* 客户价值高亮框 */
.product-value {
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.07), rgba(59, 130, 246, 0.06));
  border: 1px solid rgba(108, 92, 231, 0.16);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 22px;
}
.pv-label {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 2px;
  margin-bottom: 4px;
}
.product-value p { font-size: 14px; color: var(--c-text-2); }
.product-value strong { color: var(--c-primary); font-weight: 800; }

/* ---------- 场景解决方案 ---------- */
.solutions { background: var(--c-bg); }

.tabs {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text-2);
  background: var(--c-bg-soft);
  border: 1.5px solid var(--c-border);
  border-radius: 999px;
  transition: all 0.3s;
}
.tab-btn svg { width: 20px; height: 20px; }
.tab-btn:hover {
  color: var(--c-primary);
  border-color: rgba(108, 92, 231, 0.4);
}
.tab-btn.active {
  color: #fff;
  background: var(--grad-primary);
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
}

.tab-panel {
  animation: fadeUp 0.5s ease;
}
.tab-panel[hidden] { display: none; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.solution-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 26px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  padding: 40px;
}

.solution-info {
  display: flex;
  flex-direction: column;
  gap: 26px;
}
.solution-block-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  margin-bottom: 12px;
}
.solution-block-title svg {
  width: 22px; height: 22px;
  padding: 3px;
  border-radius: 50%;
}
.solution-block-title.pain { color: #e11d48; }
.solution-block-title.pain svg { color: #e11d48; background: rgba(225, 29, 72, 0.1); }
.solution-block-title.plan { color: var(--c-primary); }
.solution-block-title.plan svg { color: var(--c-primary); background: rgba(108, 92, 231, 0.12); }
.solution-block p { font-size: 15.5px; color: var(--c-text-2); }

/* 痛点列表 */
.pain-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pain-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--c-text-2);
}
.pain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #e11d48;
  opacity: 0.75;
}

.solution-coverage {
  display: flex;
  flex-direction: column;
  gap: 26px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 16px;
  padding: 28px;
}
.coverage-block h5 {
  font-size: 15px;
  color: var(--c-text-3);
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag {
  padding: 7px 16px;
  font-size: 14px;
  color: var(--c-primary);
  background: rgba(108, 92, 231, 0.08);
  border: 1px solid rgba(108, 92, 231, 0.18);
  border-radius: 999px;
  transition: all 0.25s;
}
.tag:hover {
  color: #fff;
  background: var(--grad-primary);
  border-color: transparent;
  transform: translateY(-2px);
}
.tag-ind {
  color: #0369a1;
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.2);
}
.tag-ind:hover { color: #fff; }

/* ---------- 服务保障 ---------- */
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.adv-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  padding: 40px 32px 34px;
  overflow: hidden;
  transition: transform 0.35s, box-shadow 0.35s;
}
.adv-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.adv-num {
  position: absolute;
  top: 14px; right: 24px;
  font-size: 56px;
  font-weight: 800;
  color: rgba(108, 92, 231, 0.08);
  line-height: 1;
  user-select: none;
}
.adv-icon {
  width: 60px; height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.adv-icon svg { width: 30px; height: 30px; }
.adv-card h3 { font-size: 21px; margin-bottom: 12px; }
.adv-card p { font-size: 15px; color: var(--c-text-2); }

/* 保障卡列表 */
.g-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.g-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  color: var(--c-text-2);
}
.g-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  opacity: 0.6;
}
.g-list strong { color: var(--c-text); }

/* ---------- 五步合作部署 ---------- */
.process { background: var(--c-bg-soft); }

.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 30px 20px 26px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(108, 92, 231, 0.3);
}
.step-num {
  width: 52px; height: 52px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--grad-primary);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 18px rgba(99, 102, 241, 0.35);
}
.step h3 { font-size: 18px; margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--c-text-2); }

/* 桌面端步骤间箭头 */
@media (min-width: 1025px) {
  .step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 56px;
    right: -14px;
    width: 8px; height: 8px;
    border-top: 2.5px solid var(--c-primary);
    border-right: 2.5px solid var(--c-primary);
    transform: rotate(45deg);
    opacity: 0.5;
  }
}

/* ---------- 产品试用 ---------- */
.trial {
  position: relative;
  background: linear-gradient(135deg, #4338ca 0%, #6c5ce7 45%, #3b82f6 100%);
  overflow: hidden;
}
.trial-bg { position: absolute; inset: 0; pointer-events: none; }

.trial-wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.trial-intro { color: #fff; }
.trial-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  margin: 16px 0 18px;
}
.trial-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
}
.trial-points {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.trial-points li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 500;
}
.trial-points svg {
  width: 22px; height: 22px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  padding: 4px;
}

.trial-form {
  position: relative;
  background: #fff;
  border-radius: 20px;
  padding: 38px 36px;
  box-shadow: 0 30px 70px rgba(23, 15, 80, 0.35);
}
.form-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 24px;
  text-align: center;
}

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: 8px;
}
.form-group label em {
  color: #e11d48;
  font-style: normal;
  margin-left: 2px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  color: var(--c-text);
  background: var(--c-bg-soft);
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
  appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--c-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.12);
}
.form-group input.invalid {
  border-color: #e11d48;
  background: #fff5f6;
}
.form-error {
  display: block;
  min-height: 20px;
  font-size: 13px;
  color: #e11d48;
  margin-top: 5px;
}

.form-note {
  font-size: 12.5px;
  color: var(--c-text-3);
  text-align: center;
  margin-top: 14px;
}

.form-success {
  position: absolute;
  inset: 0;
  background: #fff;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 36px;
  animation: fadeUp 0.4s ease;
}
.form-success[hidden] { display: none; }
.success-icon {
  width: 70px; height: 70px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}
.success-icon svg { width: 36px; height: 36px; }
.form-success h4 { font-size: 22px; }
.form-success p { color: var(--c-text-2); font-size: 15px; margin-bottom: 14px; }

/* ---------- 联系我们 ---------- */
.contact { background: var(--c-bg); }

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 26px 28px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.contact-card:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}
.contact-icon {
  width: 54px; height: 54px;
  flex-shrink: 0;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-icon svg { width: 26px; height: 26px; }
.contact-card h4 { font-size: 16px; margin-bottom: 4px; }
.contact-card p { font-size: 16px; color: var(--c-text-2); }
.contact-card a:hover { color: var(--c-primary); }

.qr-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.qr-card {
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.qr-placeholder {
  width: 140px; height: 140px;
  margin: 0 auto 16px;
  border: 2px dashed rgba(108, 92, 231, 0.4);
  border-radius: 14px;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--c-primary);
}
.qr-placeholder svg { width: 40px; height: 40px; opacity: 0.6; }
.qr-placeholder span { font-size: 12.5px; color: var(--c-text-3); }
.qr-card h5 { font-size: 16px; margin-bottom: 4px; }
.qr-card p { font-size: 13.5px; color: var(--c-text-3); }

/* ---------- 页脚 ---------- */
.footer {
  background: #171a2e;
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand .logo-text { color: #fff; -webkit-text-fill-color: #fff; }
.footer-slogan {
  margin-top: 18px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}
.footer-desc { font-size: 14px; color: rgba(255, 255, 255, 0.55); margin-top: 6px; }

.footer-col h5 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  padding: 5px 0;
  transition: color 0.25s, transform 0.25s;
}
.footer-col a:hover {
  color: #fff;
  transform: translateX(4px);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 0;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.45);
}
.footer-beian a:hover { color: rgba(255, 255, 255, 0.8); }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 90;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--grad-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(99, 102, 241, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all 0.35s ease;
}
.back-top svg { width: 20px; height: 20px; }
.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover { transform: translateY(-4px); }

/* ---------- 滚动入场动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { min-height: auto; }
  .hero-visual { order: -1; }
  .hero-carousel { max-width: 460px; }
  .float-chip { display: none; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); gap: 18px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .guarantee-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .solution-grid { grid-template-columns: 1fr; }
  .trial-wrap { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: #fff;
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 20px 40px rgba(30, 41, 59, 0.12);
    padding: 16px 24px 24px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link { padding: 12px 14px; font-size: 16px; }
  .nav-link::after { display: none; }
  .nav-cta { margin: 10px 0 0; text-align: center; }
  .nav-toggle { display: flex; }

  .about-cards,
  .guarantee-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 14px; }
  .step {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 16px;
    align-items: center;
    text-align: left;
    padding: 20px 22px;
  }
  .step-num { grid-row: span 2; margin: 0; }
  .solution-grid { padding: 28px 22px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-visual { display: none; }
  .trial-form { padding: 30px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-actions .btn { width: 100%; }
  .qr-cards { grid-template-columns: 1fr; }
  .tab-btn { padding: 11px 20px; font-size: 15px; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}