/* ==========================================================================
   杭州漓漓居科技有限公司 - 官方网站样式表
   设计风格：仿照 Tec-Do (明亮科技白 + 活力纯蓝/青蓝渐变 + 现代卡片微投影)
   ========================================================================== */

:root {
  --primary: #0066ff;
  --primary-hover: #0052cc;
  --primary-light: #e6f0ff;
  --primary-gradient: linear-gradient(135deg, #0066ff 0%, #00b4d8 100%);
  --cyan: #00c6ff;
  --accent-green: #10b981;
  --bg-main: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 35px -8px rgba(0, 102, 255, 0.12), 0 10px 15px -6px rgba(15, 23, 42, 0.05);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1240px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-main);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= 通用按钮与微标 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-full);
  padding: 12px 26px;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(0, 102, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 102, 255, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--text-light);
  transform: translateY(-2px);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
}

.btn-outline-white:hover {
  background: #ffffff;
  color: var(--primary);
}

.icon-arrow {
  width: 18px;
  height: 18px;
  transition: transform 0.25s ease;
}

.btn:hover .icon-arrow {
  transform: translateX(4px);
}

/* ================= 顶部导航 (首屏默认完全透明无长条底色，滚动到首页下方后浮现高透亮毛玻璃长条背景) ================= */
.site-header {
  position: fixed;
  top: 24px;
  left: 45px;
  right: 45px;
  width: calc(100vw - 90px);
  max-width: none;
  margin: 0;
  height: 68px;
  z-index: 1000;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  border-radius: var(--radius-full);
  box-shadow: none;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.brand-title {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #ffffff;
  transition: color 0.3s ease;
}

.nav-item {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}

.nav-item:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
}

/* 首屏未滚动时：激活态为半透白胶囊 */
.nav-item.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

/* 页面滚动到首页下方时：浮现高透亮毛玻璃长胶囊底色，文字自动适配为深色 */
.site-header.scrolled {
  top: 14px;
  height: 64px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.08), 0 0 1px 1px rgba(255, 255, 255, 0.6) inset;
}

.site-header.scrolled .brand-title {
  color: #0f172a;
}

.site-header.scrolled .nav-item {
  color: #475569;
}

.site-header.scrolled .nav-item:hover {
  color: var(--primary);
  background: rgba(0, 102, 255, 0.06);
}

.site-header.scrolled .nav-item.active {
  color: var(--primary);
  background: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.nav-container {
  width: 100%;
  max-width: none;
  height: 100%;
  padding: 0 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  transition: filter 0.3s ease;
}

/* 页面滚动到首页下方时，Logo恢复原本的科技纯蓝原色 */
.site-header.scrolled .logo-img {
  filter: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  padding: 0;
  border-radius: var(--radius-full);
  margin-left: auto;
  margin-right: 28px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-actions .btn {
  border: none;
  box-shadow: none;
}

.nav-actions .btn-primary:hover {
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.3);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: var(--transition);
}

.site-header.scrolled .mobile-toggle span {
  background: #0f172a;
}

/* ================= 1. Hero 视觉首屏 (仿 UniHeir 高级轮播：左侧大字、左下角分类条、右下角探索圆盘) ================= */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 720px;
  width: 100%;
  overflow: hidden;
  background: #000000;
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  transform: scale(1.04);
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
  z-index: 1;
}

.slide-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  transition: transform 6s ease-out;
}

.slide.active .slide-bg {
  transform: scale(1.05);
}

/* 渐变遮罩：左侧渐深以突出左侧大标题，底部暗部过渡给菜单与镜头圆盘 */
.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(10, 15, 30, 0.75) 0%, rgba(10, 15, 30, 0.45) 45%, rgba(10, 15, 30, 0.15) 100%),
              linear-gradient(180deg, rgba(0, 0, 0, 0.3) 0%, transparent 40%, rgba(5, 10, 20, 0.8) 100%);
  pointer-events: none;
}

.slide-container {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  z-index: 2;
}

.slide-content {
  max-width: 720px;
  text-align: left;
}

/* 文字逐字下落蹦出动画样式（放慢动画时长与缓冲） */
.char-span {
  display: inline-block;
  opacity: 0;
  transform: translateY(-36px);
  transition: transform 0.8s cubic-bezier(0.25, 1.35, 0.5, 1), opacity 0.7s ease;
  will-change: transform, opacity;
}

.slide.active .char-span {
  opacity: 1;
  transform: translateY(0);
}

.slide-tag {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 2px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 76px;
  line-height: 1.15;
  font-weight: 400;
  letter-spacing: 1px;
  color: #ffffff;
  margin: -20px 0 0 0;
  text-shadow: 0 4px 35px rgba(0, 0, 0, 0.4);
  -webkit-text-fill-color: #ffffff;
}

.hero-title .title-line {
  display: block;
}

/* 左右切换箭头按钮 */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
}

.slider-arrow svg {
  width: 24px;
  height: 24px;
}

.slider-arrow:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-50%) scale(1.08);
}

.slider-arrow.prev {
  left: 28px;
}

.slider-arrow.next {
  right: 28px;
}

/* 底部操作区：左下角分类切换竖向菜单（仅保留原横线指示条，文字已去除） + 右下角向下探索环形盘 */
.hero-bottom-bar {
  position: absolute;
  bottom: 40px;
  left: 0;
  width: 100%;
  padding: 0 60px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  z-index: 10;
  pointer-events: none;
}

.hero-switch-menu {
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: auto;
  transform: translateX(40px);
}

.switch-item {
  display: flex;
  align-items: center;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 0;
  text-align: left;
}

.indicator-bar {
  display: inline-block;
  width: 18px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.35);
  transition: all 0.3s ease;
}

.switch-item:hover .indicator-bar {
  background: rgba(255, 255, 255, 0.7);
}

.switch-item.active .indicator-bar {
  width: 36px;
  height: 4px;
  border-radius: 2px;
  background: var(--cyan);
}

/* 右下角向下探索仪表盘 (极致通透纯粹光影，保留描边) */
.explore-disc {
  position: relative;
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  pointer-events: auto;
  transition: var(--transition);
}

.explore-disc:hover {
  transform: scale(1.06);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 16px 40px rgba(0, 102, 255, 0.15);
}

.disc-circle-text {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  animation: rotateDisc 16s linear infinite;
  pointer-events: none;
}

.disc-circle-text text {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3.5px;
  fill: rgba(255, 255, 255, 0.85);
  text-transform: uppercase;
}

@keyframes rotateDisc {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.disc-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 2px;
}

.disc-title {
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.disc-sub {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.disc-arrow {
  width: 16px;
  height: 16px;
  color: #ffffff;
  margin-top: 4px;
  transition: transform 0.3s ease;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.25));
}

.explore-disc:hover .disc-arrow {
  transform: translateY(3px) translateX(3px);
}

/* ================= 通用区块标题 ================= */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 2px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ================= 2. 核心方案 (全屏视口吸附 + UniHeir 级纵向画卷连续流) ================= */
.solutions-section {
  background: #ffffff;
  position: relative;
  height: 400vh; /* 4个板块提供充足的真实滚动吸附行程 */
  margin: 0;
  padding: 0;
  border-bottom: 1px solid #f1f5f9;
}

.solutions-sticky-wrapper {
  position: sticky;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #ffffff;
}

.solutions-showcase-container {
  width: 100%;
  max-width: 1680px;
  height: 100vh;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 360px 1fr 180px; /* 左文字 + 中间大画卷 + 右侧靠边独立半轮播轴 */
  align-items: center;
  gap: 40px;
  position: relative;
  z-index: 2;
}

/* 1. 左侧文字栏：位置严格固定居中，随滚动切换内容 */
.solution-text-col {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.sol-text-item {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%) translateX(-24px);
  width: 100%;
  opacity: 0;
  visibility: hidden;
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.sol-text-item.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
  pointer-events: auto;
}

.sol-showcase-title {
  font-size: 52px; /* 原 50px -> 52px */
  font-weight: 700;
  color: #0f172a;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.sol-showcase-slogan {
  display: none;
}

.sol-showcase-desc {
  font-size: 16px;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 40px;
}

.sol-explore-btn {
  display: inline-flex;
  align-items: center;
  color: #0f172a;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.sol-explore-btn:hover {
  color: #2563eb;
}

.sol-btn-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid #e2e8f0;
  background: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.sol-btn-arrow svg {
  width: 18px;
  height: 18px;
  color: #0f172a;
  transition: transform 0.3s ease;
}

.sol-explore-btn:hover .sol-btn-arrow {
  border-color: #2563eb;
  background: #2563eb;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}

.sol-explore-btn:hover .sol-btn-arrow svg {
  color: #ffffff;
  transform: translate(2px, -2px);
}

/* 2. 中间大画卷：高度设为 100vh，无框连续排布，精准实现 01上面无图、04下面无图 */
.solution-stream-viewport {
  position: relative;
  height: 100vh;
  overflow: hidden; /* 纯视口裁剪，无框 */
  background: transparent;
  border: none;
  box-shadow: none;
  display: block; /* 移除 flex 垂直居中，改为纯顶端坐标系，让 translateY 绝对可控 */
}

.solution-stream-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  width: 100%;
  margin: 0;
  padding: 0;
  transition: transform 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

.stream-img-item {
  width: calc(100% - 20px); /* 宽度缩小 20px */
  margin: 0 auto; /* 居中 */
  height: 540px; /* 大图尺寸 (UniHeir 比例) */
  flex-shrink: 0;
  opacity: 0.22;
  transform: scale(0.96);
  transition: all 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
  cursor: pointer;
}

/* 去掉原有的主动摇摆动画，改为悬浮触发 */
.stream-img-item.active {
  opacity: 1;
  transform: scale(1);
}

.stream-img-item.active:hover {
  animation: sway 2s ease-in-out infinite;
}

@keyframes sway {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-0.5deg); }
  75% { transform: rotate(0.5deg); }
}

.stream-img-box {
  width: 100%;
  height: 100%;
  position: relative;
  border-radius: 0; /* 去掉圆角 */
  overflow: hidden;
  box-shadow: none; /* 去掉投影 */
}

.stream-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s ease;
}

.stream-img-item.active .stream-img-box img {
  transform: scale(1.03);
}

.stream-img-caption {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(226, 232, 240, 0.9);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  color: #0f172a;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
}

/* 3. 右侧轮播轴：完全独立靠在右侧边缘，只显示半弧，绝不压在图片上 */
.solution-arc-col {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  pointer-events: none;
}

.half-axis-container {
  position: relative;
  width: 160px;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}

.half-axis-svg {
  position: absolute;
  right: -80px; /* 轴心右移，视口中仅呈现左半边的弧线与刻度 */
  top: 0;
  width: 240px;
  height: 100%;
  overflow: visible;
}

.half-tick-line {
  stroke: #cbd5e1;
  stroke-width: 1.5px;
  transition: all 0.3s ease;
}

.half-tick-line.active {
  stroke: #0368fc;
  stroke-width: 3px;
  filter: none;
}

/* 轴心中心位置：横向等腰三角形指针（替代原数字） */
.axis-center-badge {
  position: absolute;
  right: -50px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 90px;
  height: 90px;
  background: transparent;
  border: none;
  box-shadow: none;
  z-index: 10;
}

.axis-arrow-icon {
  width: 36px;
  height: 36px;
  filter: none;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ================= 3. 技术全栈架构 ================= */
.platform-section {
  position: relative;
  overflow: hidden;
  background-image: url('assets/platform-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 265px 0 275px 0;
}

.platform-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 19, 43, 0.35);
  z-index: 1;
}

.platform-section .container {
  position: relative;
  z-index: 2;
  max-width: 1680px;
  padding: 0 40px;
}

.platform-content-wrap {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.platform-section .section-header {
  max-width: 100%;
  text-align: center;
}

.platform-section .section-title {
  color: #ffffff;
  font-size: 60px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.5px;
  white-space: nowrap;
  margin-bottom: 24px;
}

.platform-section .section-title .char-span,
.strengths-section .section-title .char-span {
  display: inline-block;
  opacity: 0;
  transform: translateY(-40px);
  transition: transform 0.85s cubic-bezier(0.25, 1.35, 0.5, 1), opacity 0.7s ease;
  will-change: transform, opacity;
}

.platform-section.in-view .section-title .char-span,
.strengths-section.in-view .section-title .char-span {
  opacity: 1;
  transform: translateY(0);
}

.platform-intro-text {
  color: #e2e8f0;
  font-size: 18px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  margin-bottom: 38px;
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 1.6s cubic-bezier(0.16, 1, 0.3, 1) 0.35s, transform 1.6s cubic-bezier(0.16, 1, 0.3, 1) 0.35s;
  text-align: center;
  will-change: opacity, transform;
}

.platform-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1.6s cubic-bezier(0.16, 1, 0.3, 1) 0.65s, transform 1.6s cubic-bezier(0.16, 1, 0.3, 1) 0.65s;
  will-change: opacity, transform;
}

.platform-section.in-view .platform-intro-text,
.platform-section.in-view .platform-actions {
  opacity: 1;
  transform: translateY(0);
}

.btn-capsule-more {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 13px 34px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: #ffffff;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12), inset 0 0 8px rgba(255, 255, 255, 0.08);
  transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.btn-capsule-more .icon-arrow {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}

.btn-capsule-more:hover {
  background: #ffffff;
  color: #0b132b;
  border-color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.btn-capsule-more:hover .icon-arrow {
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .platform-section .section-title {
    font-size: 32px;
    white-space: normal;
  }

  .platform-intro-text {
    font-size: 16px;
    line-height: 1.75;
  }
}

/* ================= 4. 产品矩阵 (Tab 切换) ================= */
.matrix-section {
  background: var(--bg-secondary);
}

.matrix-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  color: #475569;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tab-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.25);
}

.matrix-tab-contents {
  position: relative;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.matrix-cards-wrapper {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.matrix-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.matrix-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

.matrix-icon {
  font-size: 36px;
  margin-bottom: 20px;
}

.matrix-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}

.matrix-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
  flex: 1;
}

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag-row span {
  font-size: 12px;
  color: var(--primary);
  background: #eff6ff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* ================= 5. 核心优势 (仿钛动科技“为什么选择钛动”横向居中沉浸卡片轮播，无头像) ================= */
.strengths-section {
  background: #f2f6ff; /* 钛动同款极浅科技天青底色 */
  position: relative;
  overflow: hidden;
  padding: 120px 0 130px;
}

.strengths-section .section-header {
  max-width: 900px;
  text-align: center;
  margin: 0 auto 56px;
}

.strengths-section .section-title {
  font-size: 60px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: #0f172a;
  margin-bottom: 20px;
}

.strengths-section .section-title .gradient-text {
  display: inline-block;
  --grad-w: 600%;
}

.strengths-section .section-title .gradient-text .char-span {
  background-image: linear-gradient(90deg, #0f172a 0%, #0368fc 100%);
  background-size: var(--grad-w) 100%;
  background-position: var(--char-ratio) 0%;
  background-repeat: no-repeat;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 轮播视口与滑轨 */
.strengths-carousel {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 40px 0 40px;
}

.strengths-track {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  transition: transform 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99);
  will-change: transform;
}

.strength-slide {
  flex: 0 0 760px;
  max-width: 85vw;
  box-sizing: border-box;
  padding: 0 16px;
  cursor: default;
}

/* 卡片容器：仿钛动 box 样式，保持统一固定高度 */
.strength-box {
  position: relative;
  background: #ffffff;
  border-radius: 28px;
  height: 380px;
  padding: 48px 52px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: scale(0.92);
  opacity: 0.72;
  border: none;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.03);
  transition: transform 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99), opacity 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99), box-shadow 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99);
  overflow: hidden;
  user-select: none;
}

/* 渐变遮罩微光与大数字水印（替代小人头像，营造科技质感） */
.strength-mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 90% 10%, rgba(3, 118, 255, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
  opacity: 0;
  pointer-events: none;
}

.strength-watermark {
  position: absolute;
  top: 16px;
  right: 36px;
  font-family: 'SF Mono', 'Cascadia Code', 'Consolas', 'Courier New', monospace;
  font-size: 104px;
  font-weight: 400;
  line-height: 1;
  color: #f1f5f9;
  letter-spacing: -2px;
  pointer-events: none;
  font-feature-settings: "tnum";
  transition: color 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99), transform 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99);
  z-index: 1;
}

.strength-msg {
  position: relative;
  z-index: 2;
  margin-top: 40px;
}

.strength-msg h3 {
  font-size: 32px;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.25;
  letter-spacing: -0.3px;
  margin: 0;
  transition: color 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99);
}

.strength-word {
  position: relative;
  z-index: 2;
  font-size: 17px;
  color: #334155;
  line-height: 1.85;
  letter-spacing: 0.01em;
  opacity: 0.75;
  transition: opacity 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99), color 0.65s cubic-bezier(0.25, 0.74, 0.22, 0.99);
  margin: 0;
}

/* 激活态 (高亮卡片：竖向浅蓝到白渐变，透明度进一步降低，自然漫反射投影) */
.strength-slide.no-card-anim .strength-box,
.strength-slide.no-card-anim .strength-watermark,
.strength-slide.no-card-anim .strength-msg h3,
.strength-slide.no-card-anim .strength-word {
  transition: none !important;
}

.strength-slide.active .strength-box {
  transform: scale(1);
  opacity: 1;
  background: linear-gradient(180deg, rgba(3, 104, 252, 0.06) 0%, rgba(3, 104, 252, 0.02) 40%, #ffffff 85%);
  border: none;
  box-shadow: 0 20px 40px -15px rgba(3, 104, 252, 0.12), 0 10px 20px -10px rgba(15, 23, 42, 0.05);
}

.strength-slide.active .strength-mask {
  opacity: 0;
}

.strength-slide.active .strength-watermark {
  font-weight: 400;
  color: #d3e2ff;
  text-shadow: none;
  transform: translateY(-4px);
  z-index: 2;
}

.strength-slide.active .strength-msg h3 {
  color: #0368fc;
}

.strength-slide.active .strength-word {
  opacity: 1;
  color: #0f172a;
}

/* 悬停微动交互 */
.strength-slide:hover:not(.active) .strength-box {
  transform: scale(0.95);
  opacity: 0.9;
}

/* 底部指示器与前后翻页控制条 */
.strengths-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 36px;
}

.strengths-nav-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0f172a;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.strengths-nav-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}

.strengths-nav-btn:hover {
  background: #0376ff;
  color: #ffffff;
  border-color: #0376ff;
  box-shadow: 0 6px 18px rgba(3, 118, 255, 0.3);
  transform: translateY(-2px);
}

.strengths-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.strengths-dot {
  width: 10px;
  height: 10px;
  border-radius: 5px;
  background: #cbd5e1;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.strengths-dot.active {
  width: 32px;
  background: #0376ff;
}

@media (max-width: 768px) {
  .strength-slide {
    flex: 0 0 92vw;
    padding: 0 8px;
  }

  .strength-box {
    height: auto;
    min-height: 340px;
    padding: 32px 24px;
    border-radius: 20px;
  }

  .strength-msg h3 {
    font-size: 24px;
  }

  .strength-word {
    font-size: 15px;
    line-height: 1.7;
  }

  .strength-watermark {
    font-size: 80px;
    right: 20px;
    top: 10px;
  }
}

/* ================= 6. 关于我们 (企业大楼展示及理念) ================= */
.about-section {
  background: var(--bg-secondary);
  padding: 110px 0;
}

.about-wrapper {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.about-text-col .section-title {
  font-size: 60px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: #0f172a;
  margin-bottom: 28px;
  text-align: left;
}

.about-highlight {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.about-desc {
  font-size: 15px;
  color: #475569;
  line-height: 1.8;
  margin-bottom: 18px;
}

/* 右侧大楼展示卡片 */
.about-image-col {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-image-card {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 520px;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 20px 45px -10px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(226, 232, 240, 0.8);
  background: #ffffff;
}

.about-building-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.about-image-card:hover .about-building-img {
  transform: scale(1.04);
}

@media (max-width: 992px) {
  .about-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-image-card {
    max-width: 100%;
    height: 420px;
  }
}

/* ================= 页脚 (科技渐变蓝底，无电话地址) ================= */
.site-footer {
  background: var(--primary-gradient);
  border-top: none;
  padding: 64px 0 32px;
  color: #ffffff;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 380px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.footer-logo .logo-img {
  width: 32px;
  height: 32px;
}

.footer-logo .brand-title {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
}

.footer-slogan {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
}

.footer-nav-groups {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.group-title {
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.footer-link {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  flex-wrap: wrap;
  gap: 12px;
}

.icp-link {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.2s ease;
}

.icp-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* ================= 回到顶部按钮 ================= */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #ffffff;
  color: var(--primary);
  border: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* ================= 响应式适配 ================= */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 56px;
  }
  .hero-bottom-bar {
    padding: 0 30px;
    bottom: 24px;
  }
  .strengths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-section {
    min-height: 580px;
    height: 90vh;
  }
  .hero-title {
    font-size: 38px;
    letter-spacing: -0.5px;
    line-height: 1.2;
  }
  .slide-container {
    padding: 0 20px;
  }
  .explore-disc {
    display: none;
  }
  .hero-bottom-bar {
    padding: 0 20px;
    bottom: 20px;
    justify-content: flex-start;
  }
  .site-header {
    top: 12px;
    left: 12px;
    right: 12px;
    width: calc(100% - 24px);
    height: 60px;
    padding: 0;
  }
  .nav-container {
    padding: 0 16px;
  }
  .nav-menu {
    position: fixed;
    top: 80px;
    left: 12px;
    right: 12px;
    width: calc(100% - 24px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    flex-direction: column;
    padding: 20px;
    gap: 12px;
    border: none;
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .mobile-toggle {
    display: flex;
  }
  .nav-actions .btn {
    display: none;
  }
  .hero-title {
    font-size: 32px;
  }
  .solutions-grid, .matrix-cards-wrapper {
    grid-template-columns: 1fr;
  }
  .arch-tier {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .strengths-grid {
    grid-template-columns: 1fr;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .cta-box {
    padding: 40px 20px;
  }
  .cta-title {
    font-size: 26px;
  }
  .cta-btn-group {
    flex-direction: column;
  }
}