/* =============================================================
   鑫思享 · 数字创意服务公司官网
   设计系统 / 全局样式
   -------------------------------------------------------------
   色彩规范（严格执行）
     主色  金砂白 #F8F9FA  /  哑光深灰 #343A40   → 页面大面积
     辅助  香槟金 #E9C46A  → 仅按钮 / 标题高亮 / 重点标签
     点缀  深墨绿 #2A9D8F  → 仅资源赋能高亮 / 案例客户 logo 边框
     禁用  高饱和红 · 亮橙 · 纯黑大面积
   ============================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  /* 色彩 */
  --sand:        #F8F9FA;
  --sand-deep:   #F1F3F5;
  --white:       #FFFFFF;
  --ink:         #343A40;
  --ink-soft:    #46505A;
  --ink-mute:    #6C757D;
  --ink-faint:   #9AA3AB;
  --gold:        #E9C46A;
  --gold-deep:   #D9B04F;
  --gold-wash:   #FBF4E4;
  --teal:        #2A9D8F;
  --teal-wash:   #E8F4F2;
  --line:        #E4E8EB;
  --line-soft:   #EDF0F2;

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 24px;

  /* 阴影 */
  --sh-xs: 0 1px 2px rgba(52, 58, 64, .04);
  --sh-sm: 0 2px 6px rgba(52, 58, 64, .05), 0 8px 20px rgba(52, 58, 64, .04);
  --sh-md: 0 6px 14px rgba(52, 58, 64, .07), 0 18px 40px rgba(52, 58, 64, .07);
  --sh-lg: 0 12px 28px rgba(52, 58, 64, .10), 0 32px 64px rgba(52, 58, 64, .09);

  /* 版心 */
  --maxw: 1200px;
  --gutter: 28px;

  /* 缓动（克制、无回弹） */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-soft: cubic-bezier(.4, 0, .2, 1);

  /* 字体 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
          "Noto Sans SC", "Hiragino Sans GB", system-ui, -apple-system,
          "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-num: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

/* ---------- 2. Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;          /* 页面滚动平滑 */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  background: var(--sand);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -.01em;
}

p { margin: 0; }

::selection { background: var(--gold-wash); color: var(--ink); }

/* 滚动条（低调） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--sand-deep); }
::-webkit-scrollbar-thumb { background: #cfd6db; border-radius: 10px; border: 2px solid var(--sand-deep); }
::-webkit-scrollbar-thumb:hover { background: #b9c2c9; }

/* ---------- 3. Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: 104px 0; position: relative; scroll-margin-top: 86px; }
.section--tight { padding: 76px 0; }
.section--sand { background: var(--sand); }
.section--white { background: var(--white); }
.section--ink { background: var(--ink); color: #D7DBDF; }

/* 章节标题组 */
.sec-head { max-width: 720px; margin-bottom: 56px; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

.sec-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 600;
  letter-spacing: -.02em;
}
.sec-title em {
  font-style: normal;
  color: var(--ink);
  background: linear-gradient(transparent 62%, var(--gold) 62%, var(--gold) 88%, transparent 88%);
  padding: 0 2px;
}

.sec-desc {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-mute);
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .01em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
              background-color .28s var(--ease), color .28s var(--ease),
              border-color .28s var(--ease);
}
.btn:active { transform: translateY(1px); }

/* 主按钮 —— 香槟金，仅此一处用金 */
.btn--gold {
  background: var(--gold);
  color: var(--ink);
  box-shadow: 0 4px 14px rgba(233, 196, 106, .34);
}
.btn--gold:hover {
  background: var(--gold-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(233, 196, 106, .42);
}

.btn--ink {
  background: var(--ink);
  color: #fff;
}
.btn--ink:hover { background: #23282d; transform: translateY(-2px); box-shadow: var(--sh-md); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--ink-faint); background: var(--white); transform: translateY(-2px); }

.btn--on-dark {
  background: transparent;
  color: #EFF1F2;
  border-color: rgba(255, 255, 255, .26);
}
.btn--on-dark:hover { border-color: rgba(255, 255, 255, .6); background: rgba(255, 255, 255, .07); transform: translateY(-2px); }

.btn--block { width: 100%; }

/* ---------- 5. Header ---------- */
.hdr {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  height: 72px;
  display: flex;
  align-items: center;
  background: rgba(248, 249, 250, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}
.hdr.is-stuck { border-bottom-color: var(--line); background: rgba(248, 249, 250, .94); }
.hdr__in { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; }

/* Logo */
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand__mark {
  width: 29px; height: 39px;
  flex: none;
  display: block;
  background: none;
}
.brand__logo { display: block; width: 100%; height: 100%; object-fit: contain; }

/* 深色页脚：LOGO 自带白色描边，需衬一枚白色底片，否则黑色笔画会沉入深底 */
.ftr .brand__mark {
  width: auto; height: 43px;
  padding: 4px 5px;
  background: #fff;
  border-radius: 9px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .18);
}
.ftr .brand__logo { width: auto; height: 35px; }
.brand__txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-size: 17px; font-weight: 700; color: var(--ink); letter-spacing: .04em; }
.brand__sub { font-size: 10px; letter-spacing: .18em; color: var(--ink-faint); text-transform: uppercase; }

/* Nav */
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 8px 15px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color .24s var(--ease), background-color .24s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute; left: 15px; right: 15px; bottom: 2px;
  height: 2px; border-radius: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--ink); font-weight: 600; }

.hdr__cta { display: flex; align-items: center; gap: 12px; }
.hdr__cta .btn { height: 42px; padding: 0 20px; font-size: 14px; }

/* 移动端菜单按钮 */
.burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  cursor: pointer;
  padding: 0;
  place-items: center;
}
.burger span { display: block; width: 17px; height: 1.6px; background: var(--ink); border-radius: 2px; transition: transform .3s var(--ease), opacity .2s; }
.burger span + span { margin-top: 4.5px; }
.burger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: 72px 0 auto 0;
  z-index: 89;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  padding: 12px 0 22px;
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .28s var(--ease), transform .28s var(--ease);
}
.drawer.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
.drawer a { display: block; padding: 13px var(--gutter); font-size: 16px; font-weight: 500; color: var(--ink-soft); }
.drawer a:hover { background: var(--sand); color: var(--ink); }
.drawer .btn { margin: 14px var(--gutter) 0; }
/* 抽屉内的块级按钮：已有 margin 撑出版心，宽度必须交给自动计算。
   若沿用 .btn--block 的 width:100%（= 抽屉整宽），左 margin 会把它推出右边界 28px。 */
.drawer .btn--block { display: flex; width: auto; }

/* ---------- 6. Banner 轮播 ---------- */
.banner {
  position: relative;
  margin-top: 72px;
  min-height: 660px;
  background: var(--ink);
  overflow: hidden;
  isolation: isolate;
}

/* 轮播层：交叉淡入淡出 */
.banner__slides { position: absolute; inset: 0; }
.b-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.035);
  transition: opacity 1.15s var(--ease-soft), transform 2.4s var(--ease-soft);
  will-change: opacity, transform;
}
.b-slide.is-on { opacity: 1; transform: scale(1); }
.b-slide svg { position: absolute; inset: 0; width: 100%; height: 100%; }

/* 底部渐深，保证文字可读 */
.banner__veil {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(52,58,64,.94) 0%, rgba(52,58,64,.80) 42%, rgba(52,58,64,.42) 72%, rgba(52,58,64,.30) 100%),
    radial-gradient(120% 90% at 88% 8%, rgba(233,196,106,.10) 0%, transparent 58%);
  pointer-events: none;
}

.banner__in {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 660px;
  /* 只设置上下内边距，保留 .wrap 的左右版心留白 */
  padding-top: 96px;
  padding-bottom: 132px;
}

/* 轮播方向标签（随图切换） */
.b-labels { position: relative; height: 34px; margin-bottom: 22px; }
.b-label {
  position: absolute; inset: 0 auto auto 0;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 15px 6px 12px;
  border: 1px solid rgba(233, 196, 106, .38);
  border-radius: 999px;
  background: rgba(233, 196, 106, .09);
  color: var(--gold);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.b-label.is-on { opacity: 1; transform: translateY(0); }
.b-label i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold);
  flex: none;
}

/* 固定 Slogan */
.banner__slogan {
  max-width: 830px;
  margin: 0;
  color: #FFFFFF;
  font-size: clamp(32px, 4.6vw, 56px);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -.022em;
}
.banner__slogan .hl {
  position: relative;
  color: var(--gold);
}
.banner__slogan .thin {
  display: block;
  font-size: .58em;
  font-weight: 400;
  color: rgba(255, 255, 255, .72);
  letter-spacing: .01em;
  margin-top: 12px;
}

.banner__lead {
  max-width: 620px;
  margin-top: 26px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .70);
}

.banner__acts { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

/* 关键数据条 */
.banner__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 44px;
  margin-top: 58px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}
.fact__n {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: -.02em;
  line-height: 1.1;
}
.fact__n small { font-size: .5em; font-weight: 500; margin-left: 3px; }
.fact__t { margin-top: 6px; font-size: 13px; color: rgba(255, 255, 255, .58); letter-spacing: .03em; }

/* 轮播指示器 */
.banner__dots {
  position: absolute;
  left: 50%; bottom: 34px;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 10px;
}
.b-dot {
  width: 30px; height: 3px;
  padding: 0; border: 0;
  border-radius: 3px;
  background: rgba(255, 255, 255, .26);
  cursor: pointer;
  overflow: hidden;
  position: relative;
  transition: background-color .3s var(--ease), width .3s var(--ease);
}
.b-dot:hover { background: rgba(255, 255, 255, .45); }
.b-dot.is-on { width: 54px; background: rgba(255, 255, 255, .25); }
.b-dot.is-on::after {
  content: "";
  position: absolute; inset: 0 auto 0 0;
  width: 0;
  background: var(--gold);
  border-radius: 3px;
}
.b-dot.is-on.run::after { width: 100%; transition: width 7s linear; }

/* 滚动提示 */
.banner__scroll {
  position: absolute;
  right: var(--gutter); bottom: 34px;
  z-index: 4;
  display: flex; align-items: center; gap: 9px;
  font-size: 12px; letter-spacing: .14em;
  color: rgba(255, 255, 255, .42);
}
.banner__scroll span { display: block; width: 1px; height: 26px; background: linear-gradient(rgba(255,255,255,.5), transparent); animation: scrollHint 2.6s var(--ease-soft) infinite; }
@keyframes scrollHint { 0%, 100% { opacity: .25; transform: scaleY(.5); } 50% { opacity: 1; transform: scaleY(1); } }

/* ---------- 7. 通用卡片 ---------- */
.card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-xs);
  transition: transform .34s var(--ease), box-shadow .34s var(--ease), border-color .34s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); border-color: #D8DEE3; }

/* 角标：配套实体资源支持 */
.tag-res {
  position: absolute;
  top: 14px; right: 14px;
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 9px;
  border-radius: 6px;
  background: var(--gold-wash);
  border: 1px solid rgba(233, 196, 106, .45);
  color: #A8832A;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
}
.tag-res::before {
  content: "";
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--gold-deep);
  flex: none;
}

/* ---------- 8. 第二板块：核心服务矩阵 ---------- */
.svc-group + .svc-group { margin-top: 62px; }

.svc-group__hd {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.svc-group__no {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-deep);
  letter-spacing: .08em;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--gold-wash);
  flex: none;
}
.svc-group__tt { font-size: 21px; font-weight: 600; color: var(--ink); }
.svc-group__note { margin-left: auto; font-size: 13.5px; color: var(--ink-faint); }

/* 资源赋能组 —— 深墨绿高亮标识 */
.svc-group--res .svc-group__no { background: var(--teal-wash); color: var(--teal); }
.svc-group--res .svc-group__hd { border-bottom-color: rgba(42, 157, 143, .28); }
.svc-group--res .svc-group__tt::after {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  margin-left: 9px;
  border-radius: 50%;
  background: var(--teal);
  vertical-align: middle;
}

.svc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.svc-grid--3 { grid-template-columns: repeat(3, 1fr); }

.svc-card { padding: 30px 26px 28px; min-height: 214px; display: flex; flex-direction: column; }
.svc-card__ico {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--sand-deep);
  color: var(--ink);
  margin-bottom: 20px;
  transition: background-color .34s var(--ease), color .34s var(--ease);
}
.svc-card__ico svg { width: 22px; height: 22px; }
.svc-card:hover .svc-card__ico { background: var(--ink); color: var(--gold); }

.svc-card--res .svc-card__ico { background: var(--teal-wash); color: var(--teal); }
.svc-card--res:hover .svc-card__ico { background: var(--teal); color: #fff; }
.svc-card--res:hover { border-color: rgba(42, 157, 143, .38); }

.svc-card__tt { font-size: 17.5px; font-weight: 600; color: var(--ink); }
.svc-card__ds { margin-top: 10px; font-size: 14px; line-height: 1.78; color: var(--ink-mute); }
.svc-card__ft {
  margin-top: auto;
  padding-top: 18px;
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; color: var(--ink-faint);
  transition: color .3s var(--ease), gap .3s var(--ease);
}
.svc-card:hover .svc-card__ft { color: var(--ink); gap: 10px; }
.svc-card--res:hover .svc-card__ft { color: var(--teal); }

/* ---------- 9. 第三板块：案例展示 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  cursor: pointer;
}
.case-card__top {
  position: relative;
  height: 148px;
  background: var(--sand-deep);
  overflow: hidden;
  flex: none;
}
.case-card__top svg { position: absolute; inset: 0; width: 100%; height: 100%; }

/* 客户 logo 边框 —— 深墨绿点缀 */
.case-card__logo {
  position: absolute;
  left: 22px; bottom: -26px;
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--white);
  border: 1.5px solid var(--teal);
  display: grid; place-items: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .04em;
  box-shadow: var(--sh-sm);
  z-index: 2;
}

.case-card__bd { padding: 42px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.case-card__meta { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.chip {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--sand-deep);
  color: var(--ink-mute);
  letter-spacing: .02em;
}
.chip--teal { background: var(--teal-wash); color: var(--teal); }

.case-card__tt { font-size: 17px; font-weight: 600; color: var(--ink); line-height: 1.5; }
.case-card__sub { margin-top: 7px; font-size: 13.5px; color: var(--ink-faint); }

/* 收益数据 */
.case-card__kpi {
  display: flex;
  gap: 26px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.kpi__n {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.02em;
  line-height: 1.2;
}
.kpi__n small { font-size: .55em; margin-left: 2px; color: var(--ink-mute); }
/* 案例指标暂用定性表述（待真实数据替换）时，改用正文字体，避免等宽字体缺中文字形 */
.kpi__n--txt { font-family: var(--font); font-size: 19px; letter-spacing: 0; }
.kpi__t { margin-top: 3px; font-size: 12px; color: var(--ink-faint); }

/* hover 展开详情 */
.case-card__more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .5s var(--ease), opacity .38s var(--ease), margin-top .5s var(--ease);
}
.case-card:hover .case-card__more,
.case-card:focus-within .case-card__more { max-height: 240px; opacity: 1; margin-top: 18px; }

.case-card__more-in {
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: var(--sand);
  border: 1px solid var(--line-soft);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-mute);
}
.case-card__more-in b { color: var(--ink); font-weight: 600; }
.case-card__more-in li { position: relative; padding-left: 16px; }
.case-card__more-in li + li { margin-top: 6px; }
.case-card__more-in li::before {
  content: "";
  position: absolute; left: 0; top: .68em;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--teal);
}

.case-card__hint {
  margin-top: 16px;
  display: flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 600; color: var(--ink-faint);
  transition: color .3s var(--ease);
}
.case-card:hover .case-card__hint { color: var(--teal); }

/* ---------- 10. 第四板块：核心优势 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.adv-card {
  position: relative;
  padding: 38px 30px 34px;
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform .34s var(--ease), box-shadow .34s var(--ease), border-color .34s var(--ease);
}
.adv-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); border-color: #D8DEE3; }
.adv-card__no {
  position: absolute;
  top: 24px; right: 26px;
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 700;
  color: var(--line-soft);
  letter-spacing: -.03em;
  line-height: 1;
}
.adv-card__ico {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--ink);
  color: var(--gold);
  margin-bottom: 24px;
}
.adv-card__ico svg { width: 24px; height: 24px; }
.adv-card__tt { font-size: 18.5px; font-weight: 600; color: var(--ink); line-height: 1.5; }
.adv-card__ds { margin-top: 12px; font-size: 14.5px; line-height: 1.82; color: var(--ink-mute); }
.adv-card__ds b { color: var(--ink); font-weight: 600; }

/* ---------- 11. 第五板块：流程 + 咨询 ---------- */
.flow-wrap {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 56px;
  align-items: start;
}

.flow { position: relative; }
.flow::before {
  content: "";
  position: absolute;
  left: 19px; top: 14px; bottom: 14px;
  width: 1.5px;
  border-radius: 2px;
  background: linear-gradient(180deg,
    var(--gold) 0, var(--gold) 70px,
    var(--line) 70px, var(--line) 100%);
}
.flow__item { position: relative; padding: 0 0 30px 62px; }
.flow__item:last-child { padding-bottom: 0; }
.flow__no {
  position: absolute; left: 0; top: 0;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--white);
  border: 1.5px solid var(--gold);
  color: var(--ink);
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  z-index: 1;
}
.flow__tt { font-size: 17px; font-weight: 600; color: var(--ink); padding-top: 8px; }
.flow__ds { margin-top: 8px; font-size: 14px; line-height: 1.8; color: var(--ink-mute); }

/* 客户筛选声明 */
.filter-note {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  padding: 20px 22px;
  border-radius: var(--r-md);
  background: var(--sand-deep);
  border-left: 3px solid var(--gold);
}
.filter-note svg { width: 20px; height: 20px; flex: none; margin-top: 3px; color: var(--gold-deep); }
.filter-note p { font-size: 14px; line-height: 1.8; color: var(--ink-soft); }
.filter-note b { color: var(--ink); font-weight: 600; }

/* 表单 */
.form-card {
  padding: 36px 34px 34px;
  border-radius: var(--r-xl);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--sh-sm);
}
.form-card__tt { font-size: 21px; font-weight: 600; color: var(--ink); }
.form-card__ds { margin-top: 9px; font-size: 14px; color: var(--ink-mute); }

.form { margin-top: 26px; display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--ink-soft); }
.field label .req { color: var(--gold-deep); margin-left: 2px; }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--sand);
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color .24s var(--ease), background-color .24s var(--ease), box-shadow .24s var(--ease);
  appearance: none;
}
.field textarea { resize: vertical; min-height: 92px; line-height: 1.7; }
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236C757D' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--ink-faint); }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  background: var(--white);
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(233, 196, 106, .18);
}

.form__agree { display: flex; gap: 9px; align-items: flex-start; font-size: 13px; color: var(--ink-mute); line-height: 1.65; }
.form__agree input { width: 16px; height: 16px; margin-top: 3px; accent-color: var(--gold-deep); flex: none; }

.form__submit { margin-top: 4px; }
.form__tip { margin-top: 14px; font-size: 12.5px; color: var(--ink-faint); text-align: center; }

/* 提交成功内联提示（JS 校验通过后短暂展示再跳转） */
.form-ok {
  display: none;
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: var(--teal-wash);
  border: 1px solid rgba(42, 157, 143, .3);
  color: #1F7A6F;
  font-size: 14px;
  font-weight: 600;
  align-items: center;
  gap: 10px;
}
.form-ok.is-on { display: flex; }

/* ---------- 12. 页脚 ---------- */
.ftr { background: var(--ink); color: rgba(255, 255, 255, .62); padding: 76px 0 0; }
.ftr__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.1fr; gap: 44px; }

.ftr .brand__name { color: #fff; }
.ftr .brand__sub { color: rgba(255, 255, 255, .42); }
.ftr__about { margin-top: 20px; font-size: 14px; line-height: 1.85; color: rgba(255, 255, 255, .55); max-width: 320px; }

.ftr__h { font-size: 14px; font-weight: 600; color: #fff; letter-spacing: .04em; margin-bottom: 18px; }
.ftr__list li + li { margin-top: 11px; }
.ftr__list a { font-size: 14px; color: rgba(255, 255, 255, .6); transition: color .24s var(--ease); }
.ftr__list a:hover { color: var(--gold); }
.ftr__list .plain { font-size: 14px; color: rgba(255, 255, 255, .6); }

/* 页脚背书条 */
.backing {
  margin-top: 60px;
  padding: 26px 30px;
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .045);
  border: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
}
.backing__lb {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12px; font-weight: 600; letter-spacing: .12em;
  color: var(--gold);
  text-transform: uppercase;
}
.backing__lb::before { content: ""; width: 18px; height: 1.5px; background: var(--gold); border-radius: 2px; }
.backing__items { display: flex; flex-wrap: wrap; gap: 12px; }
.backing__item {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  font-size: 13.5px;
  color: rgba(255, 255, 255, .82);
}
.backing__item svg { width: 15px; height: 15px; color: var(--gold); flex: none; }
.backing__item em { font-style: normal; color: rgba(255, 255, 255, .48); font-size: 12.5px; }

.ftr__btm {
  margin-top: 52px;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, .42);
}
.ftr__btm a:hover { color: rgba(255, 255, 255, .8); }

/* 页脚备案信息（右下角，含工信部备案系统外链） */
.ftr__beian { line-height: 1.7; }
.ftr__beian a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(255, 255, 255, .26);
  transition: color .24s var(--ease), text-decoration-color .24s var(--ease);
}
.ftr__beian a:hover { color: rgba(255, 255, 255, .88); text-decoration-color: currentColor; }

/* ---------- 13. 滚动淡入（克制） ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .78s var(--ease), transform .78s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }

/* 客户筛选横条 */
.stripe-note {
  background: var(--ink);
  color: rgba(255, 255, 255, .78);
  padding: 18px 0;
}
.stripe-note__in { display: flex; align-items: center; gap: 14px; justify-content: center; flex-wrap: wrap; text-align: center; }
.stripe-note svg { width: 18px; height: 18px; color: var(--gold); flex: none; }
.stripe-note p { font-size: 14px; letter-spacing: .01em; }
.stripe-note b { color: #fff; font-weight: 600; }

/* ---------- 14. 通用页头（子页面） ---------- */
.page-hero {
  margin-top: 72px;
  padding: 96px 0 84px;
  background: var(--ink);
  position: relative;
  overflow: hidden;
}
.page-hero svg.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; }
.page-hero__in { position: relative; z-index: 2; max-width: 780px; }
.crumb { font-size: 13px; color: rgba(255, 255, 255, .44); letter-spacing: .04em; margin-bottom: 20px; }
.crumb a:hover { color: var(--gold); }
.crumb span { margin: 0 8px; }
.page-hero h1 {
  color: #fff;
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.3;
}
.page-hero h1 em { font-style: normal; color: var(--gold); }
.page-hero p { margin-top: 20px; font-size: 16.5px; line-height: 1.9; color: rgba(255, 255, 255, .68); }

/* ---------- 15. AI 演示页 ---------- */
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }

.demo-card {
  border-radius: var(--r-xl);
  background: var(--white);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .34s var(--ease), box-shadow .34s var(--ease);
}
.demo-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); }

.demo-card__view {
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--ink);
  overflow: hidden;
}
.demo-card__view svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.demo-card__badge {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 13px;
  border-radius: 999px;
  background: rgba(52, 58, 64, .72);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(233, 196, 106, .34);
  font-size: 12px; font-weight: 600; color: var(--gold);
  letter-spacing: .04em;
}
.demo-card__badge i { width: 5px; height: 5px; border-radius: 50%; background: var(--gold); }

/* 演示播放条 */
.demo-card__bar {
  position: absolute; left: 16px; right: 16px; bottom: 16px; z-index: 2;
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  border-radius: 12px;
  background: rgba(52, 58, 64, .78);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, .1);
}
.demo-card__bar .pl {
  width: 30px; height: 30px; flex: none;
  border-radius: 50%;
  background: var(--gold);
  display: grid; place-items: center;
  color: var(--ink);
}
.demo-card__bar .pl svg { width: 12px; height: 12px; }
.demo-card__bar .tt { font-size: 13px; color: rgba(255, 255, 255, .88); font-weight: 500; }
.demo-card__bar .tm { margin-left: auto; font-family: var(--font-num); font-size: 12px; color: rgba(255, 255, 255, .5); }

.demo-card__bd { padding: 28px 28px 30px; }
.demo-card__tt { font-size: 19px; font-weight: 600; color: var(--ink); }
.demo-card__ds { margin-top: 11px; font-size: 14.5px; line-height: 1.82; color: var(--ink-mute); }

.demo-steps { margin-top: 22px; padding-top: 20px; border-top: 1px dashed var(--line); display: grid; gap: 13px; }
.demo-step { display: flex; gap: 12px; align-items: flex-start; font-size: 13.8px; line-height: 1.72; color: var(--ink-mute); }
.demo-step b { color: var(--ink); font-weight: 600; }
.demo-step__n {
  width: 22px; height: 22px; flex: none;
  border-radius: 6px;
  background: var(--gold-wash);
  color: #A8832A;
  font-family: var(--font-num);
  font-size: 11.5px; font-weight: 700;
  display: grid; place-items: center;
  margin-top: 1px;
}
.demo-step--teal .demo-step__n { background: var(--teal-wash); color: var(--teal); }

/* 场景限定声明 */
.scope-bar {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 22px 24px;
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  margin-bottom: 44px;
}
.scope-bar svg { width: 20px; height: 20px; color: var(--teal); flex: none; margin-top: 3px; }
.scope-bar p { font-size: 14.5px; line-height: 1.82; color: var(--ink-soft); }
.scope-bar b { color: var(--ink); font-weight: 600; }

/* 试用说明卡 */
.trial-card {
  margin-top: 44px;
  padding: 40px 42px;
  border-radius: var(--r-xl);
  background: var(--ink);
  color: rgba(255, 255, 255, .74);
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.trial-card__bd { flex: 1 1 420px; position: relative; z-index: 2; }
.trial-card h3 { color: #fff; font-size: 23px; font-weight: 600; }
.trial-card h3 em { font-style: normal; color: var(--gold); }
.trial-card p { margin-top: 12px; font-size: 14.5px; line-height: 1.85; }
.trial-card__acts { position: relative; z-index: 2; }

/* ---------- 16. 留资引导页 ---------- */
.thanks {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 120px 0 72px;
  background: var(--sand);
  position: relative;
  overflow: hidden;
}
.thanks__card {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 560px;
  /* .wrap 是块级容器，卡片必须显式居中，否则会贴在左侧 */
  margin-left: auto;
  margin-right: auto;
  padding: 48px 46px 42px;
  border-radius: var(--r-xl);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--sh-lg);
  text-align: center;
}
.thanks__ico {
  width: 68px; height: 68px;
  margin: 0 auto 26px;
  border-radius: 20px;
  background: var(--teal-wash);
  color: var(--teal);
  display: grid; place-items: center;
}
.thanks__ico svg { width: 32px; height: 32px; }
.thanks__card h1 { font-size: 27px; font-weight: 600; letter-spacing: -.01em; }
.thanks__card h1 em { font-style: normal; color: var(--gold-deep); }
.thanks__card > p { margin-top: 14px; font-size: 15px; line-height: 1.85; color: var(--ink-mute); }

/* 二维码占位 */
.qr-box {
  margin: 30px auto 0;
  width: 190px; height: 190px;
  border-radius: var(--r-lg);
  border: 1px dashed var(--line);
  background: var(--sand);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.qr-box svg { width: 118px; height: 118px; color: #C7CFD6; }
.qr-box__lb {
  position: absolute; bottom: 12px; left: 0; right: 0;
  text-align: center; font-size: 11.5px; color: var(--ink-faint); letter-spacing: .04em;
}

.thanks__list { margin-top: 32px; text-align: left; display: grid; gap: 13px; }
.thanks__list li { display: flex; gap: 11px; align-items: flex-start; font-size: 14px; line-height: 1.72; color: var(--ink-soft); }
.thanks__list svg { width: 17px; height: 17px; color: var(--teal); flex: none; margin-top: 3px; }

.thanks__acts { margin-top: 34px; display: grid; gap: 12px; }
.thanks__note { margin-top: 22px; font-size: 12.5px; color: var(--ink-faint); line-height: 1.7; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: 1fr; }
  .ftr__grid { grid-template-columns: 1fr 1fr; gap: 38px; }
  .flow-wrap { grid-template-columns: 1fr; gap: 48px; }
  .demo-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .burger { display: grid; }
  .hdr__cta .btn { display: none; }
}

@media (max-width: 720px) {
  :root { --gutter: 20px; }
  .section { padding: 68px 0; }
  .section--tight { padding: 52px 0; }
  .sec-head { margin-bottom: 38px; }

  .banner { min-height: 600px; }
  .banner__in { min-height: 600px; padding-top: 68px; padding-bottom: 112px; }
  .banner__slogan { font-size: clamp(19px, 6.2vw, 26px); }
  .banner__slogan .thin { font-size: .64em; margin-top: 9px; }
  .banner__lead { font-size: 15.5px; margin-top: 20px; }
  .banner__acts { margin-top: 30px; }
  .banner__facts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px 18px;
    margin-top: 38px;
    padding-top: 24px;
  }
  .fact__n { font-size: 24px; }
  .banner__scroll { display: none; }
  .banner__acts .btn { width: 100%; }

  .svc-grid, .svc-grid--3 { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .ftr__grid { grid-template-columns: 1fr; gap: 34px; }
  .form-card { padding: 28px 22px 26px; }
  .trial-card { padding: 30px 24px; }
  .thanks__card { padding: 36px 24px 32px; }
  .svc-group__note { display: none; }
}

/* ---------- 18. 无障碍：尊重减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}