/* ===================================================================
   易智学术 - SCI论文一站式协助服务
   现代改版：延续主站品牌橙，引入大留白 / 渐变光晕 / 玻璃拟态 /
   微交互 / 滚动揭示 / 数字滚动 等当代落地页语言。
   版心 1180px，与主站保持一致。
   =================================================================== */

:root {
  /* 品牌色 */
  --orange: #E39F00;
  --orange-lt: #F5B725;
  --orange-dk: #C48300;
  --orange-soft: #FFF7E6;
  --orange-wash: #FFFBEF;
  --blue: #0062FF;
  --blue-dk: #0047C4;
  --blue-soft: #EAF1FF;
  --blue-wash: #F4F7FF;
  --blue-line: #D6E2FA;

  /* 中性色 */
  --ink: #1A2230;
  --ink-2: #4A5568;
  --ink-3: #8A94A6;
  --line: #E9ECF1;
  --line-2: #F1F3F7;
  --bg: #FFFFFF;
  --bg-soft: #F5F7FA;
  --ink-deep: #081726;
  --ink-deep-2: #0E2338;

  /* 圆角 / 阴影 */
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 16px;
  --r-pill: 999px;
  --sh-sm: 0 1px 2px rgba(16,24,40,.04);
  --sh: 0 6px 18px -8px rgba(16,24,40,.1);
  --sh-lg: 0 20px 40px -18px rgba(16,24,40,.16);
  --sh-orange: 0 16px 32px -12px rgba(227,159,0,.5);
  --sh-blue: 0 16px 34px -14px rgba(0,98,255,.45);

  --max: 1180px;
  --gutter: 24px;
  --header-h: 110px;
  --header-h-sm: 62px;
  --ease: cubic-bezier(.22,.61,.36,1);
} 

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

html { scroll-behavior: smooth; }

/* body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
} */

/* img { display: block; max-width: 100%; height: auto; } */
a { text-decoration: none; color: inherit; }
ul, li { list-style: none; }
h1, h2, h3, h4 { font-weight: 700; letter-spacing: -.01em; }

/* 版心：桌面锁定 1180，窄屏改为随视口收缩并保留安全边距 */
.w-1180 {
  width: min(var(--max), 100% - var(--gutter) * 2);
  margin: 0 auto;
}

/* ---------- 通用图标（内联 SVG 由 CSS 着色） ---------- */
.ico {
  width: 16px;
  height: 16px;
  display: inline-block;
  vertical-align: -2px;
  margin-right: 8px;
  background: currentColor;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.ico-tel {
  -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M22 16.92v3a2 2 0 0 1-2.18 2 19.79 19.79 0 0 1-8.63-3.07 19.5 19.5 0 0 1-6-6 19.79 19.79 0 0 1-3.07-8.67A2 2 0 0 1 4.11 2h3a2 2 0 0 1 2 1.72c.13.96.36 1.9.7 2.81a2 2 0 0 1-.45 2.11L8.09 9.91a16 16 0 0 0 6 6l1.27-1.27a2 2 0 0 1 2.11-.45c.9.34 1.85.57 2.81.7A2 2 0 0 1 22 16.92z'/></svg>");
  mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M22 16.92v3a2 2 0 0 1-2.18 2 19.79 19.79 0 0 1-8.63-3.07 19.5 19.5 0 0 1-6-6 19.79 19.79 0 0 1-3.07-8.67A2 2 0 0 1 4.11 2h3a2 2 0 0 1 2 1.72c.13.96.36 1.9.7 2.81a2 2 0 0 1-.45 2.11L8.09 9.91a16 16 0 0 0 6 6l1.27-1.27a2 2 0 0 1 2.11-.45c.9.34 1.85.57 2.81.7A2 2 0 0 1 22 16.92z'/></svg>");
}
.ico-mail {
  -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><rect x='2' y='4' width='20' height='16' rx='2'/><path d='m22 7-8.97 5.7a1.94 1.94 0 0 1-2.06 0L2 7'/></svg>");
  mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><rect x='2' y='4' width='20' height='16' rx='2'/><path d='m22 7-8.97 5.7a1.94 1.94 0 0 1-2.06 0L2 7'/></svg>");
}
.ico-clock {
  -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='12' cy='12' r='10'/><polyline points='12 6 12 12 16 14'/></svg>");
  mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='12' cy='12' r='10'/><polyline points='12 6 12 12 16 14'/></svg>");
}

/* ---------- 按钮 ---------- */
.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 56px;
  padding: 0 40px;
  border: none;
  border-radius: var(--r-pill);
  background: linear-gradient(135deg, var(--orange-lt), var(--orange));
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  overflow: hidden;
  box-shadow: var(--sh-orange);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.55), transparent 70%);
  transform: translateX(-120%);
  transition: transform .7s var(--ease);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 22px 40px -14px rgba(227,159,0,.62); }
.btn-primary:hover::after { transform: translateX(120%); }
.btn-primary:active { transform: translateY(-1px) scale(.99); }

/* ================= 头部 ================= */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 1045;
  transition: box-shadow .3s ease, background .3s ease;
}

/* 顶部信息条：左橙右蓝斜切（保留主站识别度） */
.topbar {
  height: 40px;
  background: linear-gradient(
    to right,
    var(--orange) 0,
    var(--orange) calc(50% - 250px),
    var(--blue) calc(50% - 250px),
    var(--blue) 100%
  );
}
.topbar-inner {
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}
.topbar-inner::before {
  content: "";
  position: absolute;
  left: calc(50% - 280px);
  top: 0;
  border-bottom: 40px solid transparent;
  border-left: 30px solid var(--orange);
}
.topbar-left span {
  line-height: 40px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .02em;
}
.topbar-right {
  display: flex;
  align-items: center;
  color: #EAF6FB;
  position: relative;
  z-index: 1;
}
.topbar-right .contact {
  display: flex;
  align-items: center;
  margin-left: 44px;
  font-size: 15px;
  font-weight: 600;
}
.topbar-right .contact .ico { color: #fff; width: 15px; height: 15px; }
.topbar-right .btn-login {
  margin-left: 44px;
  height: 26px;
  line-height: 24px;
  padding: 0 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
  background: rgba(255,255,255,.95);
  border-radius: var(--r-pill);
  transition: transform .25s var(--ease), background .25s ease;
}
.topbar-right .btn-login:hover { transform: translateY(-1px); background: #fff; }

/* 顶部个人中心入口（登录态） */
.btn-user-top {
  display: none;
  align-items: center;
  gap: 8px;
  height: 26px;
  margin-left: 44px;
  padding: 0 14px 0 4px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,.95);
  color: var(--blue-dk);
  font-size: 12px;
  font-weight: 600;
  transition: transform .25s var(--ease), background .25s ease;
}
.btn-user-top:hover { transform: translateY(-1px); background: #fff; }
.btn-user-top .avatar {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--orange-lt), var(--orange));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

/* 主导航：滚动后玻璃拟态 */
.navbar {
  height: 70px;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid rgba(16,24,40,.06);
  transition: height .3s var(--ease);
}
.navbar-inner {
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: height .3s var(--ease);
}
.brand img { width: 100px; height: 57px; object-fit: contain; }
.menu { display: flex; align-items: center; }
.menu-item {
  position: relative;
  margin-left: 40px;
  line-height: 70px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-2);
  transition: color .25s ease;
}
.menu-item::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 18px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--orange);
  transform: translateX(-50%);
  transition: width .3s var(--ease);
}
.menu-item:hover { color: var(--ink); }
.menu-item:hover::after { width: 18px; }
.menu-item.active { color: var(--orange-dk); font-weight: 700; }
.menu-item.active::after { width: 26px; }

/* 汉堡按钮：仅窄屏显示 */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin-left: auto;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform .3s var(--ease), opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.menu-drop { position: relative; }
.dropdown {
  position: absolute;
  top: 62px; left: 20px;
  min-width: 168px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  box-shadow: var(--sh-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}
.menu-drop:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block;
  padding: 9px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink-2);
  transition: background .2s ease, color .2s ease;
}
.dropdown a:hover { background: var(--orange-wash); color: var(--orange-dk); }

/* 滚动后头部收紧 */
.site-header.scrolled { box-shadow: 0 4px 24px -8px rgba(16,24,40,.14); }
.site-header.scrolled .navbar,
.site-header.scrolled .navbar-inner { height: 62px; }
.site-header.scrolled .menu-item { line-height: 62px; }
.site-header.scrolled .menu-item::after { bottom: 14px; }

/* main { padding-top: var(--header-h); } */

/* ================= 1. Hero ================= */
.sci-banner {
  position: relative;
  overflow: hidden;
  background: #FFFFFF url("../image/banner-sci.jpg") no-repeat right center;
  background-size: auto 100%;
  isolation: isolate;
}
/* 右侧图片向左淡出，与白底无缝衔接 */
.sci-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(90deg, #FFFFFF 0%, #FFFFFF 34%, rgba(255,255,255,.92) 44%, rgba(255,255,255,0) 60%);
}
.sci-banner-inner {
  position: relative;
  z-index: 1;
  min-height: 470px;
  display: flex;
  align-items: center;
  padding: 64px 0;
}
.sci-banner-text { max-width: 660px; }
.sci-banner-title {
  font-size: 52px;
  line-height: 1.16;
  color: #0A2540;
  letter-spacing: -.02em;
}
.sci-banner-title .hl {
  color: var(--orange);
}
.sci-banner-sub {
  margin-top: 20px;
  font-size: 17px;
  line-height: 1.9;
  color: #3D5875;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 34px;
}

/* Hero 数据条：标题下方、按钮上方，四等分 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 38px;
  padding-top: 30px;
  border-top: 1px solid rgba(11,99,214,.14);
}
.hero-stat {
  padding-left: 20px;
  border-left: 1px solid rgba(11,99,214,.14);
}
.hero-stat:first-child {
  padding-left: 0;
  border-left: 0;
}
.hero-stat .num {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.1;
  color: #0A2540;
  letter-spacing: -.02em;
}
.hero-stat .num .unit { font-size: 14px; font-weight: 700; color: #0B63D6; }
.hero-stat .label {
  margin-top: 6px;
  font-size: 13px;
  color: #6B8299;
}

/* ================= 通用区块 ================= */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-soft); }

/* 蓝色系锚点区块：白底 + 淡蓝底纹色块，制造明暗节奏（替代大面积彩色渐变） */
.section-dark {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #FBFCFE 0%, #F5F7FA 100%);
  border-top: 1px solid var(--blue-line);
  border-bottom: 1px solid var(--blue-line);
}
.section-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(40% 54% at 6% 0%, rgba(0,98,255,.035) 0%, rgba(0,98,255,0) 68%),
    radial-gradient(38% 52% at 98% 100%, rgba(0,98,255,.025) 0%, rgba(0,98,255,0) 70%);
  pointer-events: none;
}
.section-dark > * { position: relative; z-index: 1; }
.section-dark .section-title { color: #0A2540; }
.section-dark .section-desc { color: #4A6684; }

/* 标题区：统一居中，上方加英文小标提供层级锚点 */
.section-head { max-width: 780px; margin: 0 auto 48px; text-align: center; }
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--blue);
}
.section-eyebrow::before,
.section-eyebrow::after {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  opacity: .5;
}
.section-dark .section-eyebrow { color: var(--blue); }
.section-head-left {
  max-width: 100%;
  margin: 0 0 40px;
  text-align: left;
  padding-left: 20px;
  border-left: 4px solid var(--blue);
}
.section-head-left .section-eyebrow::before { display: none; }
.section-head-left .section-title { font-size: 34px; }
.section-head-left .section-desc { margin-top: 12px; }
.section-title {
  font-size: 36px;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: -.02em;
}
.section-desc {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ================= 2. 服务介绍 ================= */
.intro-section {
  background:
    radial-gradient(52% 70% at 4% 12%, rgba(0,98,255,.055), transparent 68%),
    #fff;
}
.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 4fr);
  align-items: center;
  gap: 68px;
}
.intro-media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--bg-soft);
  box-shadow: var(--sh-lg);
  aspect-ratio: 4 / 3;
}
.intro-media img { width: 100%; height: 100%; object-fit: cover; }
.intro-media::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  z-index: -1;
  border: 1px solid rgba(0,98,255,.18);
  border-radius: var(--r-lg);
}
.intro-media,
.intro-text { min-width: 0; }
.intro-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(0,98,255,.1), transparent 55%);
  pointer-events: none;
}
.intro-text .section-title { font-size: 36px; }
.intro-text .section-title span {
  position: relative;
  color: var(--orange-dk);
}
.intro-text .section-title span::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3px;
  z-index: -1;
  height: 9px;
  border-radius: 6px;
  background: rgba(227,159,0,.16);
}
.section-eyebrow-left { justify-content: flex-start; }
.section-eyebrow-left::after { display: none; }
.intro-text > p {
  margin-top: 18px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-2);
  text-align: justify;
}
/* 介绍区要点：补充信息密度，避免“大图 + 大段文字”显得空 */
.intro-points {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  margin-top: 28px;
  padding-left: 2px;
  padding-right: 2px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.intro-points li { white-space: nowrap; }
.intro-points li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  background: var(--blue-soft);
  color: var(--blue-dk);
  font-size: 15.5px;
  font-weight: 700;
}
.intro-points li::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--blue);
}
/* ================= 3. 为什么选择 ================= */
.why-grid {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: 24px;
  align-items: stretch;
}
.why-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.why-card {
  position: relative;
  padding: 24px 26px 22px 28px;
  background: #fff;
  border: 1px solid rgba(10,37,64,.1);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 28px -24px rgba(10,37,64,.45);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s ease, background .35s ease;
}
.why-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--why-accent, var(--blue));
  opacity: .82;
  transform: scaleY(.34);
  transform-origin: 50% 0;
  transition: transform .45s var(--ease), opacity .35s ease;
}
.why-card::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--why-glow, rgba(0,98,255,.13)), rgba(255,255,255,0) 68%);
  pointer-events: none;
  transition: transform .5s var(--ease), opacity .35s ease;
}
.why-card-featured {
  --why-accent: var(--blue);
  --why-glow: rgba(0,98,255,.11);
  display: flex;
  flex-direction: column;
  padding: 38px 38px 34px;
  border-color: rgba(0,98,255,.22);
  background:
    radial-gradient(112% 76% at 0% 0%, rgba(0,98,255,.075), rgba(0,98,255,0) 58%),
    #fff;
  box-shadow:
    0 30px 60px -36px rgba(0,55,170,.34),
    inset 0 1px 0 rgba(255,255,255,.9);
}
.why-card-featured::before {
  width: 5px;
  opacity: 1;
  transform: scaleY(1);
}
.why-card-featured::after {
  width: 180px;
  height: 180px;
  top: -110px;
  right: -96px;
  background: radial-gradient(circle, rgba(0,98,255,.1), rgba(0,98,255,0) 68%);
}
.why-card-featured > * {
  position: relative;
  z-index: 1;
}
.why-card-featured > .why-icon::after {
  content: "";
  position: absolute;
  inset: -8px;
  border: 1px solid rgba(0,98,255,.16);
  border-radius: 16px;
  pointer-events: none;
}
.why-card-featured > .why-icon {
  position: relative;
  box-shadow:
    0 10px 22px -16px rgba(0,98,255,.5),
    inset 0 1px 0 rgba(255,255,255,.85);
}
.why-card-featured h3 {
  font-size: 24px;
  margin-bottom: 18px;
  letter-spacing: -.02em;
}
.why-card-featured li {
  font-size: 15.5px;
  line-height: 1.92;
}
.why-card-featured li::before {
  top: calc(15.5px * 1.92 / 2);
  width: 8px;
  height: 8px;
  transform: translateY(-50%);
  border: 2px solid #fff;
  background: var(--blue);
  box-shadow: 0 0 0 1px rgba(0,98,255,.24);
}
/* 权威资质卡：图片保持原始比例，右下角对齐 */
.why-feature-media {
  align-self: flex-end;
  width: min(100%, 360px);
  margin: auto -38px -34px 0;
}
.why-feature-media img {
  display: block;
  width: 100%;
  height: auto;
}
.why-card:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--why-accent, var(--blue)) 52%, #fff);
  box-shadow:
    0 24px 48px -28px rgba(10,37,64,.38),
    inset 0 0 0 1px color-mix(in srgb, var(--why-accent, var(--blue)) 22%, transparent);
}
.why-card:hover::before {
  transform: scaleY(1);
  opacity: 1;
}
.why-card:hover::after {
  transform: scale(1.1) translate(-4px, 4px);
}
.why-card-featured:hover { transform: translateY(-4px); }
.why-icon {
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border-radius: 14px;
  background: #F4F7FB;
  color: var(--why-accent, var(--blue));
  box-shadow: 0 8px 20px -16px rgba(10,37,64,.4);
}
.why-side .why-card {
  --why-glow: rgba(0,98,255,.055);
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  grid-template-rows: 48px auto;
  column-gap: 16px;
  row-gap: 10px;
  min-height: 0;
  align-content: center;
}
.why-side .why-card:nth-child(1) {
  --why-accent: #0062FF;
  --why-glow: rgba(0,98,255,.06);
}
.why-side .why-card:nth-child(2) {
  --why-accent: #008F9C;
  --why-glow: rgba(0,143,156,.065);
}
.why-side .why-card:nth-child(3) {
  --why-accent: #C48300;
  --why-glow: rgba(227,159,0,.075);
}
.why-side .why-card:nth-child(2) .why-icon {
  background: #F1F8F8;
}
.why-side .why-card:nth-child(3) .why-icon {
  background: #FBF7EE;
}
.why-side .why-icon {
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  width: 48px;
  height: 48px;
  margin-bottom: 0;
  border-radius: 13px;
}
.why-side .why-card h3 {
  grid-column: 2;
  grid-row: 1;
  align-self: center;
  margin-bottom: 0;
  font-size: 17px;
  line-height: 1.45;
}
.why-side .why-card ul {
  grid-row: 2;
  grid-column: 1 / -1;
  margin-top: 0;
}
.why-card h3 {
  font-size: 20px;
  color: var(--ink);
  margin-bottom: 14px;
  transition: color .3s ease;
}
.why-card:hover h3 { color: #0062FF; }
.why-card li {
  position: relative;
  padding-left: 19px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}
.why-card li + li { margin-top: 6px; }
.why-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(15px * 1.85 / 2);
  width: 7px; height: 7px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: var(--why-accent, var(--blue));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--why-accent, var(--blue)) 10%, transparent);
}

/* ================= 4. 面临挑战 ================= */
.pain-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 16px; }
.pain-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px 18px 20px;
  border-radius: 10px;
  background: rgba(255,255,255,.7);
  border: 1px solid rgba(10,37,64,.09);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  transition: transform .3s var(--ease), border-color .3s ease, box-shadow .3s ease, color .3s ease, background .3s ease;
}
.pain-item > .pain-num {
  order: 3;
  flex: 0 0 58px;
  margin-left: auto;
  text-align: right;
}
.pain-item:hover {
  transform: translateY(-3px);
  border-color: rgba(0,98,255,.35);
  background: #fff;
  box-shadow: 0 16px 32px -22px rgba(0,98,255,.42);
  color: #0062FF !important;
}
.pain-num {
  color: rgba(10,37,64,.1);
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.04em;
  transition: color .3s ease;
}
.pain-item:hover .pain-num {
  color: rgba(0,98,255,.22);
}
.pain-icon {
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--blue-soft);
  color: var(--blue);
}

/* ================= 5. 服务流程 ================= */
.flow-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 12px;
}
.flow-grid::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 4%;
  right: 4%;
  height: 2px;
  background: linear-gradient(90deg, rgba(0,98,255,.15), rgba(0,98,255,.65), rgba(0,98,255,.15));
}
.flow-card {
  position: relative;
  z-index: 1;
  padding: 0 8px;
  background: transparent;
  border: 0;
  box-shadow: none;
  transition: transform .35s var(--ease);
}
.flow-card:hover {
  transform: translateY(-3px);
}
.flow-step {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border: 4px solid #F7FAFF;
  border-radius: 50%;
  background: #fff;
  color: var(--blue);
  font-size: 10px;
  letter-spacing: .04em;
  box-shadow: 0 0 0 1px rgba(0,98,255,.25);
  transition: background .3s ease, color .3s ease, box-shadow .3s ease;
}
.flow-card:first-child .flow-step {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 1px var(--blue), 0 10px 22px -14px rgba(0,98,255,.8);
}
/* 鼠标进入流程后，仅保留当前步骤为高亮；移开后第一步恢复默认高亮 */
.flow-grid:hover .flow-card:first-child .flow-step {
  background: #fff;
  color: var(--blue);
  box-shadow: 0 0 0 1px rgba(0,98,255,.25);
}
.flow-card:hover .flow-step {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 0 0 1px var(--blue), 0 10px 22px -14px rgba(0,98,255,.8);
}
.flow-card h3 { text-align: center; }
.flow-step {
  letter-spacing: .04em;
}
.flow-card h3 {
  margin-top: 0;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
  transition: color .3s ease;
}
.flow-card:hover h3 { color: #0062FF; }
.flow-card p { margin-top: 7px; font-size: 13px; line-height: 1.7; color: var(--ink-2); text-align: center; }
.flow-num {
  display: none;
}
.flow-card:hover .flow-num { color: rgba(0,98,255,.22); }

/* ================= 6. 服务细分（卡片 + 标题水印数字） ================= */
.detail-focus {
  position: relative;
  /* 三段服务色相：准备 / 评审 / 发表 */
  --stage-1: #E39F00;
  --stage-1-soft: rgba(227,159,0,.16);
  --stage-2: #0B63E5;
  --stage-2-soft: rgba(11,99,229,.15);
  --stage-3: #0E9F8A;
  --stage-3-soft: rgba(14,159,138,.16);
}

.node-cloud {
  position: relative;
  margin-top: 8px;
}
.cloud-nodes {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

/* 服务卡片：序号压在标题后方，作为若隐若现的底纹 */
.detail-node {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 154px;
  padding: 26px 20px;
  border: 1px solid rgba(10,37,64,.09);
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 12px 32px -26px rgba(10,37,64,.45);
  overflow: visible;
  cursor: pointer;
  font-family: inherit;
  text-align: center;
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, transform .3s var(--ease);
}
.detail-node .node-index {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -52%);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  font-size: clamp(92px, 9vw, 122px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.04em;
  color: #1A2230;
  opacity: .065;
  pointer-events: none;
  transition: color .35s ease, opacity .35s ease;
}
.detail-node .node-label {
  display: block;
  position: relative;
  z-index: 1;
  max-width: 100%;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
  transition: color .3s ease;
}
/* 每段节点使用各自的色相 */
.detail-node[data-stage="prepare"] { --node-accent: var(--stage-1); --node-accent-soft: var(--stage-1-soft); }
.detail-node[data-stage="review"] { --node-accent: var(--stage-2); --node-accent-soft: var(--stage-2-soft); }
.detail-node[data-stage="publish"] { --node-accent: var(--stage-3); --node-accent-soft: var(--stage-3-soft); }

.detail-node:hover,
.detail-node.is-active,
.detail-node:focus-visible {
  background: linear-gradient(135deg, #fff 0%, var(--node-accent-soft) 100%);
  border-color: var(--node-accent);
  box-shadow: 0 22px 46px -30px var(--node-accent);
  transform: translateY(-4px);
  outline: none;
  z-index: 5;
}
.detail-node:hover .node-index,
.detail-node.is-active .node-index,
.detail-node:focus-visible .node-index {
  color: var(--node-accent);
  opacity: .12;
}
.detail-node:hover .node-label,
.detail-node.is-active .node-label,
.detail-node:focus-visible .node-label { color: var(--node-accent); }

/* 悬停气泡：显示服务描述 */
.node-bubble {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 14px);
  width: min(320px, 78vw);
  padding: 18px 20px 16px;
  transform: translate(-50%, 8px);
  background: #fff;
  border: 1px solid rgba(10,37,64,.1);
  border-top: 3px solid var(--node-accent);
  border-radius: 14px;
  box-shadow: 0 28px 60px -32px rgba(10,37,64,.6);
  text-align: left;
  opacity: 0;
  visibility: hidden;
  contain: layout paint;
  pointer-events: none;
  transition: opacity .26s ease, transform .3s var(--ease), visibility .26s;
  z-index: 30;
}
.node-bubble::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  background: #fff;
  border-right: 1px solid rgba(10,37,64,.1);
  border-bottom: 1px solid rgba(10,37,64,.1);
  transform: rotate(45deg);
}
.bubble-caption {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--node-accent);
  text-transform: uppercase;
}
.bubble-title {
  display: block;
  margin-top: 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}
.bubble-text {
  display: block;
  margin-top: 9px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}
.detail-node:hover .node-bubble,
.detail-node.is-active .node-bubble,
.detail-node:focus-visible .node-bubble {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* 首行节点气泡默认向上会超出，改为向下展开 */
.detail-node.is-row-first .node-bubble {
  top: calc(100% + 14px);
  bottom: auto;
  transform: translate(-50%, -8px);
}
.detail-node.is-row-first .node-bubble::after {
  top: -7px;
  bottom: auto;
  border: 0;
  border-left: 1px solid rgba(10,37,64,.1);
  border-top: 1px solid rgba(10,37,64,.1);
}
.detail-node.is-row-first:hover .node-bubble,
.detail-node.is-row-first.is-active .node-bubble,
.detail-node.is-row-first:focus-visible .node-bubble {
  transform: translate(-50%, 0);
}

/* ================= 7. 立即咨询 ================= */
.consult {
  position: relative;
  overflow: visible;
  margin: 42px 0 0;
  background:
    radial-gradient(70% 140% at 92% 0%, rgba(120,180,255,.30) 0%, rgba(120,180,255,0) 60%),
    linear-gradient(120deg, #0A3FA8 0%, #0B57D8 52%, #0A47BC 100%);
  isolation: isolate;
}
.consult-inner {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: 34px 0;
}
.consult-copy { position: relative; z-index: 3; flex: 0 1 720px; max-width: 720px; }
.consult-cta {
  font-size: 32px;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: 0;
}
.consult-cta strong { color: #FFFFFF; font-weight: 800; }
.consult-sub {
  display: flex;
  align-items: center;
  margin-top: 12px;
  font-size: 16px;
  font-weight: 700;
  color: rgba(255,255,255,.92);
}
.consult-sub .ico {
  flex: 0 0 auto;
  margin-right: 9px;
  color: rgba(255,255,255,.96);
}
.consult-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
}
.consult-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  height: 46px;
  padding: 0 28px;
  border-radius: 4px;
  background: #fff;
  color: var(--blue);
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 14px 30px -18px rgba(0,0,0,.55);
  transition: transform .25s var(--ease), box-shadow .25s ease;
}
.consult-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 36px -18px rgba(0,0,0,.6);
}
.consult-qr {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 140px;
  height: 140px;
  padding: 4px;
  margin-left: auto;
  margin-right: 320px;
  flex: 0 0 auto;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 7px;
  background: rgba(255,255,255,.08);
  color: rgba(255,255,255,.9);
  font-family: inherit;
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease;
}
.consult-qr:hover,
.consult-qr:focus-visible {
  border-color: rgba(255,255,255,.5);
  background: rgba(255,255,255,.16);
}
.consult-qr:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.consult-qr-thumb {
  display: block;
  width: 100%;
  height: 100%;
  padding: 4px;
  border-radius: 4px;
  background: #fff;
}
.consult-qr-thumb img { width: 100%; height: 100%; object-fit: contain; }
.consult-qr-popover {
  position: absolute;
  left: -8px;
  bottom: calc(100% + 16px);
  z-index: 20;
  width: 190px;
  padding: 12px 14px 13px;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  text-align: center;
  box-shadow: 0 20px 46px -14px rgba(0,20,80,.55);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(0, 10px) scale(.94);
  transform-origin: left bottom;
  transition: opacity .24s ease, visibility .24s ease, transform .24s var(--ease);
}
.consult-qr-popover::after {
  content: "";
  position: absolute;
  left: 36px;
  top: 100%;
  width: 12px;
  height: 12px;
  background: #fff;
  transform: translate(-50%, -6px) rotate(45deg);
}
.consult-qr-popover img {
  width: 148px;
  height: 148px;
  margin: 0 auto 7px;
}
.consult-qr-popover strong {
  display: block;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}
.consult-qr:hover .consult-qr-popover,
.consult-qr:focus-visible .consult-qr-popover {
  opacity: 1;
  visibility: visible;
  transform: translate(0, 0) scale(1);
}
.consult-visual {
  position: absolute;
  top: auto;
  bottom: 47px;
  right: max(calc((100% - var(--max)) / 2 + 2px), 0px);
  z-index: 2;
  width: 284px;
  height: 284px;
  display: block;
  pointer-events: none;
}
.consult-visual > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 30px 34px rgba(0,22,84,.36));
}

/* ================= 8. 服务案例 ================= */
/* 版心 - 左右箭头留白 = 一屏宽度，每页 2 张卡；宽度改为随版心自适应 */
.case-slider {
  --case-gap: 24px;
  --case-per-view: 2;
  --case-arrow-slot: 56px;
  position: relative;
  padding: 0 var(--case-arrow-slot) 52px;
}
/* 上下留出内边距：卡片 hover 上移 / 投影扩散时不会被 overflow:hidden 裁掉顶部 */
.case-viewport {
  overflow: hidden;
  width: 100%;
  padding: 12px 0 16px;
  margin: -12px 0 -16px;
}
.case-track {
  display: flex;
  flex-wrap: nowrap;
  width: 100%;
  transition: transform .55s var(--ease);
  will-change: transform;
}
/* 每页 = 一屏宽：基于 viewport 的 100%，切换位移用 transform 百分比 */
.case-page {
  flex: 0 0 100%;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: max-content;
  align-content: start;
  gap: 20px 24px;
  box-sizing: border-box;
}
.case-page > * { min-width: 0; max-width: 100%; }
.case-card {
  width: 100%;
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 18px;
  min-width: 0;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: var(--r);
  box-shadow: 0 14px 34px -22px rgba(16,24,40,.3);
  transition: transform .3s var(--ease), border-color .3s ease, box-shadow .3s ease;
}
.case-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: var(--sh-lg);
}
.case-thumb {
  width: 118px; height: 168px;
  object-fit: cover;
  border-radius: var(--r-sm);
  background: var(--bg-soft);
}
.case-body { display: flex; flex-direction: column; min-width: 0; }
.case-table { width: 100%; border-collapse: collapse; }
.case-table th,
.case-table td {
  padding: 6px 0;
  vertical-align: top;
  text-align: left;
  font-size: 13px;
  line-height: 1.55;
}
.case-table th {
  width: 72px;
  color: var(--ink-3);
  font-weight: 400;
  white-space: nowrap;
  transition: color .3s ease;
}
.case-card:hover .case-table th { color: #0062FF; }
.case-table td { color: var(--ink); word-break: break-word; }
.case-table .tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--r-pill);
  background: rgba(0,127,175,.1);
  color: var(--blue-dk);
  font-size: 12px;
  font-weight: 700;
}
.case-comment {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--ink-2);
}
.case-comment span { color: var(--ink-3); white-space: nowrap; }

/* 轮播箭头 */
.case-arrow {
  position: absolute;
  top: 50%;
  width: 44px; height: 44px;
  margin-top: -48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255,255,255,.94);
  color: var(--ink);
  cursor: pointer;
  box-shadow: 0 10px 26px -12px rgba(16,24,40,.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background .25s ease, color .25s ease, border-color .25s ease, transform .25s var(--ease);
}
.case-arrow:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  transform: scale(1.06);
}
.case-arrow:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.case-prev { left: 0; }
.case-next { right: 0; }

/* 轮播指示点 */
.case-dots {
  position: absolute;
  left: 0; right: 0; bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
}
.case-dots .dot {
  width: 8px; height: 8px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: #D6DCE5;
  cursor: pointer;
  transition: width .3s var(--ease), background .3s ease;
}
.case-dots .dot.active {
  width: 26px;
  border-radius: var(--r-pill);
  background: var(--blue);
}

/* ================= 页脚 ================= */
.site-footer {
  position: relative;
  background: #12161F;
  color: #fff;
  padding: 68px 0 40px;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--blue));
}
.footer-inner { display: flex; justify-content: space-between; gap: 48px; }
.footer-col { display: flex; flex-direction: column; }
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-link { margin-bottom: 12px; font-size: 14px; line-height: 1.9; color: rgba(255,255,255,.62); }
.footer-link a { margin-right: 12px; color: rgba(255,255,255,.62); transition: color .2s ease; }
.footer-link a:hover,
.footer-link-us a:hover,
.footer-friend a:hover { color: var(--orange-lt); }
.footer-copyright {
  margin-top: 20px;
  font-size: 12px;
  line-height: 1.9;
  color: rgba(255,255,255,.4);
}
.footer-copyright a { color: rgba(255,255,255,.4); }
.footer-link-us { display: flex; flex-wrap: wrap; gap: 12px 36px; width: 176px; font-size: 14px; }
.footer-link-us a { color: rgba(255,255,255,.62); transition: color .2s ease; }
.footer-friend { margin-top: 22px; font-size: 12px; color: rgba(255,255,255,.4); }
.footer-friend a { color: rgba(255,255,255,.4); }
.footer-contact { display: flex; align-items: center; margin-bottom: 12px; font-size: 14px; color: rgba(255,255,255,.62); }
.footer-contact .ico { color: var(--orange-lt); }
.footer-qr {
  width: 108px; height: 108px;
  margin-top: 8px;
  padding: 5px;
  background: #fff;
  border-radius: var(--r-sm);
}
.footer-qr img { width: 100%; height: 100%; }

/* ================= 登录弹框 ================= */
.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(8,18,32,.58);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s;
}
.modal-mask.open { opacity: 1; visibility: visible; }
.modal-box {
  position: relative;
  width: 460px;
  max-width: 100%;
  max-height: calc(100vh - 36px);
  overflow-y: auto;
  padding: 42px 36px 34px;
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 16px;
  background: #fff;
  text-align: left;
  box-shadow: 0 28px 70px -18px rgba(0,20,62,.5);
  transform: translateY(18px) scale(.96);
  transition: transform .3s var(--ease);
}
.modal-mask.open .modal-box { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: #F3F6F9;
  color: var(--ink-3);
  font-size: 27px;
  font-weight: 300;
  line-height: 1;
  cursor: pointer;
  transition: color .2s ease, transform .2s ease;
}
.modal-close:hover { background: #EAF0F5; color: var(--ink); transform: rotate(90deg); }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.login-brand {
  display: flex;
  justify-content: center;
  margin-bottom: 34px;
}
.login-brand img { width: 156px; height: auto; }
.login-form { width: 100%; }
.login-input {
  display: block;
  width: 100%;
  height: 50px;
  padding: 0 16px;
  border: 1px solid #E7EAF0;
  border-radius: 5px;
  outline: 0;
  background: #F7FAFC;
  color: var(--ink);
  font-family: inherit;
  font-size: 16px;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.login-input + .login-input { margin-top: 12px; }
.login-input::placeholder { color: #8B96A7; opacity: 1; }
.login-input:focus {
  border-color: var(--orange);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(227,159,0,.14);
}
.login-captcha {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 142px;
  gap: 10px;
  margin-top: 12px;
}
.login-captcha .login-input { height: 52px; }
.captcha-image {
  height: 50px;
  padding: 0;
  border: 1px solid #E7EAF0;
  border-radius: 5px;
  background: #fff;
  overflow: hidden;
  cursor: pointer;
}
.captcha-image svg { display: block; width: 100%; height: 100%; }
.login-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  font-size: 16px;
}
.login-options a { color: var(--orange-dk); }
.login-remember {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #607080;
  cursor: pointer;
}
.login-remember input {
  width: 19px; height: 19px;
  margin: 0;
  accent-color: var(--orange);
}
.login-submit {
  width: 100%;
  height: 48px;
  margin-top: 20px;
  border: 0;
  border-radius: 5px;
  background: var(--orange);
  color: #fff;
  font-family: inherit;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease;
}
.login-submit:hover { background: var(--orange-dk); transform: translateY(-1px); }
.login-register {
  margin-top: 23px;
  color: #6C7787;
  font-size: 16px;
  text-align: center;
}
.login-register a { color: var(--orange-dk); }

/* ================= 滚动揭示动画 ================= */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }
/* 依次延迟 */
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }

/* ===================================================================
   响应式：桌面 ≥1200 保持原设计，以下逐级降级
   断点：1200 / 1024 / 900 / 768 / 560
   =================================================================== */

/* ---------- ≤1200px：版心收窄，箭头留白缩小 ---------- */
@media (max-width: 1200px) {
  :root { --header-h: 108px; }
  .case-slider { --case-arrow-slot: 46px; --case-gap: 20px; }
  .case-arrow { width: 40px; height: 40px; margin-top: -44px; }
  .menu-item { margin-left: 26px; font-size: 15px; }
  .topbar-right .contact,
  .topbar-right .btn-login,
  .btn-user-top { margin-left: 24px; }
}

/* ---------- ≤1024px：平板。导航折叠为抽屉，列表降到单列 ---------- */
@media (max-width: 1024px) {
  :root { --header-h: 102px; --gutter: 20px; }

  /* 顶部信息条：保留电话与登录，隐藏次要信息 */
  .topbar-inner::before { display: none; }
  .topbar-right .contact .ico { margin-right: 6px; }
  .topbar-right .contact:last-of-type { display: none; }

  /* 导航变抽屉 */
  .nav-toggle { display: flex; }
  .menu {
    position: absolute;
    top: 100%; left: 0; right: 0;
    display: block;
    max-height: 0;
    overflow: hidden;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 34px -22px rgba(16,24,40,.35);
    transition: max-height .38s var(--ease);
  }
  .menu.open { max-height: 80vh; overflow-y: auto; }
  .menu-item {
    display: block;
    margin-left: 0;
    padding: 0 var(--gutter);
    line-height: 1.6;
    font-size: 16px;
    border-top: 1px solid var(--line-2);
  }
  .menu-item:first-child { border-top: 0; }
  .menu > .menu-item { padding-top: 15px; padding-bottom: 15px; }
  .menu-item::after { display: none; }
  .menu-item.active {
    color: var(--orange-dk);
    background: var(--orange-wash);
  }
  .menu-drop { position: static; }
  .dropdown {
    position: static;
    min-width: 0;
    padding: 0 0 8px;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .dropdown a { padding: 11px var(--gutter) 11px 34px; font-size: 14px; }
  .navbar-inner { position: relative; }

  /* Hero：文案与数据条收窄 */
  .sci-banner-inner { min-height: 0; padding: 52px 0 56px; }
  .sci-banner-text { max-width: 560px; }
  .sci-banner-title { font-size: 42px; }
  .sci-banner-sub { font-size: 16px; }

  /* 双列 → 单列 */
  .intro-grid { grid-template-columns: 1fr; gap: 36px; }
  .intro-media { max-width: 560px; }
  .why-grid { grid-template-columns: 1fr; }
  .why-side { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .why-side .why-card:last-child { grid-column: 1 / -1; }
  .pain-grid { grid-template-columns: 1fr; }
  .flow-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); row-gap: 26px; }
  .flow-grid::before { display: none; }
  /* 服务细分：平板 3 列 */
  .cloud-nodes { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  /* 咨询条：改纵向排布 */
  .consult-inner {
    gap: 28px;
    padding: 44px 0;
  }
  .consult-copy { max-width: 58%; }
  .consult-cta { font-size: 26px; }
  .consult-qr {
    width: 112px;
    height: 112px;
    margin-right: 150px;
  }
  .consult-visual {
    top: auto;
    bottom: 44px;
    right: 28px;
    width: 258px;
    height: 258px;
  }
  .consult-visual > img { width: 100%; height: 100%; }

  /* 案例轮播：一屏 1 张 */
  .case-slider { --case-arrow-slot: 0px; padding: 0 0 56px; }
  .case-page { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 20px; }
  .case-arrow { top: auto; bottom: 0; margin-top: 0; }
  .case-prev { left: calc(50% - 60px); }
  .case-next { right: calc(50% - 60px); }
  .case-dots { bottom: 17px; }
  .case-card { grid-template-columns: 140px 1fr; }
  .case-thumb { width: 140px; height: 190px; }

  /* 页脚：两列 */
  .footer-inner { flex-wrap: wrap; gap: 40px; }
  .footer-col:first-child { flex: 1 1 100%; }
}

/* ---------- ≤768px：窄屏手机横向。首屏图片移到文案下方，保证文字可读性 ---------- */
@media (max-width: 768px) {
  :root { --gutter: 18px; --header-h: 98px; }

  .topbar-left span { font-size: 14px; }
  .topbar-right .contact { font-size: 13px; margin-left: 16px; }
  .topbar-right .btn-login { margin-left: 16px; }
  .brand img { width: 88px; height: 50px; }

  /* 首屏：白底文字区 + 图片区上下堆叠，渐隐改为纵向 */
  .sci-banner {
    background-position: right bottom;
    background-size: auto 56%;
    background-repeat: no-repeat;
  }
  .sci-banner::before {
    background: linear-gradient(
      180deg,
      #FFFFFF 0%, #FFFFFF 42%,
      rgba(255,255,255,.9) 50%,
      rgba(255,255,255,0) 64%
    );
  }
  .sci-banner-inner { padding: 40px 0 220px; }
  .sci-banner-text { max-width: 100%; }
  .sci-banner-title { font-size: 32px; line-height: 1.22; }
  .sci-banner-title .hl { display: inline; }
  .sci-banner-sub { margin-top: 14px; font-size: 15px; line-height: 1.8; }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 0;
    margin-top: 26px;
    padding-top: 22px;
  }
  .hero-stat { padding-left: 16px; }
  .hero-stat:nth-child(odd) { padding-left: 0; border-left: 0; }
  .hero-stat .num { font-size: 24px; }
  .hero-actions { margin-top: 26px; }
  .btn-primary { height: 50px; padding: 0 30px; font-size: 16px; }

  /* 正文间距 */
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 34px; }
  .section-title { font-size: 26px; }
  .section-desc { margin-top: 12px; font-size: 15px; }
  .section-head-left { padding-left: 14px; margin-bottom: 28px; }
  .section-head-left .section-title { font-size: 24px; }
  .intro-text .section-title { font-size: 26px; }
  .intro-text > p { font-size: 14.5px; line-height: 1.85; text-align: left; }
  .intro-points { flex-wrap: wrap; margin-top: 20px; padding-top: 18px; }
  .intro-points li { font-size: 14px; padding: 8px 15px; }
  .why-card h3 { font-size: 18px; }
  .why-card li { font-size: 14px; }
  .why-card li::before { top: calc(14px * 1.85 / 2); }
  .why-card-featured li::before { top: calc(14px * 1.92 / 2); }
  .pain-item { padding: 16px 18px; font-size: 15px; }
  .flow-grid { gap: 14px; }
  .flow-card { padding: 24px 20px 22px; }
  .flow-num { font-size: 32px; }
  /* 服务细分：手机 2 列 */
  .cloud-nodes { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .detail-node { min-height: 126px; padding: 20px 14px; }
  .detail-node .node-index { font-size: 78px; }
  .detail-node .node-label { font-size: 17px; }
  .intro-points { flex-wrap: wrap; margin-top: 20px; padding-top: 18px; }
  .intro-points li { font-size: 14px; padding: 8px 15px; }
  .why-side { grid-template-columns: 1fr; }
  .why-side .why-card:last-child { grid-column: auto; }
  .why-side .why-card {
    grid-template-columns: 46px minmax(0, 1fr);
    grid-template-rows: 46px auto;
  }
  .why-card { padding: 22px 20px 20px 23px; }
  .why-card-featured { padding: 28px 23px 24px 26px; }
  .why-featured-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pain-num { flex-basis: 48px; font-size: 29px; }

  .consult-inner {
    min-height: 360px;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 34px 0;
  }
  .consult-copy {
    max-width: 54%;
    text-align: left;
  }
  .consult-cta { font-size: 24px; }
  .consult-sub { margin-top: 12px; }
  .consult-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    margin-top: 22px;
  }
  .consult-qr {
    width: 112px;
    height: 112px;
    margin-left: auto;
    margin-right: 112px;
    transform: none;
  }
  .consult-visual {
    top: auto;
    bottom: 38px;
    right: -38px;
    width: 208px;
    height: 208px;
  }
  .consult-visual > img {
    width: 100%;
    height: 100%;
  }
  .consult-qr-popover {
    left: -8px;
    top: auto;
    bottom: calc(100% + 16px);
    transform: translate(0, 10px) scale(.94);
    transform-origin: left bottom;
  }
  .consult-qr-popover::after {
    bottom: auto;
    top: 100%;
    transform: translate(-50%, -6px) rotate(45deg);
  }
  .consult-qr:hover .consult-qr-popover,
  .consult-qr:focus-visible .consult-qr-popover {
    transform: translate(0, 0) scale(1);
  }

  /* 案例：竖向卡片，缩略图与大图并排的小屏改为上下结构 */
  .case-slider { padding: 0 0 60px; }
  .case-page { grid-template-columns: 1fr; gap: 16px; }
  .case-card { grid-template-columns: 1fr; gap: 16px; padding: 18px; }
  .case-thumb { width: 100%; height: 200px; }
  .case-prev { left: calc(50% - 56px); }
  .case-next { right: calc(50% - 56px); }
  .case-table th { width: 76px; font-size: 12.5px; }
  .case-table td { font-size: 12.5px; }

  /* 页脚单列 */
  .site-footer { padding: 52px 0 34px; }
  .footer-inner { flex-direction: column; gap: 34px; }
  .footer-col { width: 100%; }
  .footer-link-us { width: 100%; gap: 12px 28px; }

  /* 弹框适配窄屏 */
  .modal-mask { padding: 16px; }
  .modal-box { width: 100%; max-width: 440px; padding: 34px 24px 28px; }
  .modal-title { font-size: 20px; }
}

/* ---------- ≤560px：小屏手机，进一步压缩 ---------- */
@media (max-width: 560px) {
  :root { --gutter: 16px; }

  .topbar-left span { font-size: 13px; }
  .topbar-right .contact { font-size: 12px; margin-left: 12px; }
  .topbar-right .btn-login { height: 24px; line-height: 22px; padding: 0 12px; margin-left: 12px; }

  .sci-banner { background-size: auto 50%; }
  .sci-banner-inner { padding: 32px 0 190px; }
  .sci-banner-title { font-size: 27px; }
  .sci-banner-sub { font-size: 14px; }
  .hero-stat .num { font-size: 21px; }
  .hero-stat .label { font-size: 12px; }
  .btn-primary { height: 48px; padding: 0 26px; font-size: 15px; }

  .section-title { font-size: 23px; }
  .flow-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-card { padding-top: 4px; }
  .flow-step { width: 50px; height: 50px; margin-bottom: 12px; }
  .flow-card p { font-size: 12.5px; }
  .consult-cta { font-size: 21px; }
  .consult-inner { min-height: 360px; }
  .consult-copy { max-width: 62%; }
  .consult-qr {
    width: 96px;
    height: 96px;
    margin-left: auto;
    margin-right: 52px;
  }
  .consult-visual {
    top: auto;
    bottom: 36px;
    right: -46px;
    width: 178px;
    height: 178px;
  }
  .consult-visual > img { width: 100%; height: 100%; }
  .case-thumb { height: 170px; }

  .modal-mask { padding: 0; }
  .modal-box {
    width: 100%;
    padding: 42px 22px 28px;
  }
  .modal-close { top: 10px; right: 12px; }
  .login-brand { margin-bottom: 30px; }
  .login-brand img { width: 146px; }
  .login-captcha { grid-template-columns: minmax(0, 1fr) 112px; }
  .login-options,
  .login-register { font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ================= 服务细分：移动端描述气泡 ================= */
@media (max-width: 768px) {
  .node-bubble {
    display: none;
    position: absolute;
    left: 16px !important;
    right: 16px !important;
    bottom: 18px !important;
    top: auto !important;
    width: auto;
    max-width: none;
    max-height: min(62vh, 420px);
    overflow-y: auto;
    transform: none;
    margin: 0 !important;
    z-index: 200;
  }
  .detail-node:hover .node-bubble,
  .detail-node.is-active .node-bubble,
  .detail-node:focus-visible .node-bubble {
    display: block;
    transform: none;
  }
  .detail-node { transform: none !important; }
}