/* =========================================================
   奇川展览 HILLTOP EXHIBITION — 官网样式
   设计基调：稳重红 + 灰 + 留白（政企质感 / 科技感平衡）
   ========================================================= */

:root{
  /* 品牌色 */
  --red:        #9E2A2B;   /* 主红，取自奇川 Logo */
  --red-deep:   #7A1F20;
  --red-soft:   #B8534F;
  --red-bright: #C85F5A;
  --red-tint:   #F6ECEC;   /* 极浅红，用于背景 */
  --red-veil:   rgba(158,42,43,.12);
  --gold:       #C7A15A;

  /* 中性 */
  --ink:        #1A1A1A;   /* 主文字 */
  --ink-2:      #3D3D3D;
  --gray:       #6B6B6B;   /* 次要文字 */
  --gray-3:     #9A9A9A;
  --line:       #E6E4E2;   /* 分隔线 */
  --bg:         #FFFFFF;
  --bg-soft:    #F7F6F4;   /* 浅灰留白底 */
  --bg-dark:    #141518;   /* 深色区块 */

  /* 科技蓝点缀（仅 AI/数智处少量使用） */
  --blue:       #1E6FB8;

  /* 排版 */
  --font: "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;

  /* 尺寸 */
  --maxw: 1240px;
  --gutter: clamp(18px,4vw,32px);
  --nav-h: 76px;
  --radius: 4px;
  --shadow: 0 18px 50px rgba(20,20,20,.13);
  --shadow-sm: 0 8px 26px rgba(20,20,20,.07);
  --shadow-lg: 0 28px 76px rgba(20,20,20,.18);
  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
}

/* ---------- Reset ---------- */
*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; overflow-x:hidden; }
body{
  font-family:var(--font);
  color:var(--ink);
  background:
    linear-gradient(180deg, #fff 0%, #fff 58%, #faf9f7 100%);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
h1,h2,h3,h4{ line-height:1.25; font-weight:700; letter-spacing:.01em; }
::selection{ background:var(--red); color:#fff; }
:focus-visible{ outline:3px solid rgba(200,95,90,.42); outline-offset:4px; }

/* ---------- 布局工具 ---------- */
.container{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 var(--gutter); }
.section{ padding:clamp(76px,8vw,116px) 0; position:relative; overflow-x:clip; }
.section--soft{
  background:
    linear-gradient(180deg, #faf9f7 0%, var(--bg-soft) 100%);
}
.section--dark{
  background:
    linear-gradient(145deg, #111215 0%, #17191e 48%, #111215 100%);
  color:#fff;
}
.center{ text-align:center; }

.eyebrow{
  display:inline-block;
  font-size:13px; font-weight:600; letter-spacing:.22em;
  color:var(--red); text-transform:uppercase;
  margin-bottom:18px;
}
.section--dark .eyebrow{ color:var(--red-soft); }

.section-title{
  font-size:clamp(30px,4vw,46px);
  letter-spacing:.02em;
  color:var(--ink);
  text-wrap:balance;
}
.section--dark .section-title{ color:#fff; }
.section-title .accent{ color:var(--red); }

.section-intro{
  max-width:760px; margin:22px auto 0;
  color:var(--gray); font-size:17.5px; line-height:1.85;
  text-wrap:pretty;
}
.section--dark .section-intro{ color:#B9BBC0; }

.section-head{ margin-bottom:58px; }
.section-head.center{
  display:flex; flex-direction:column; align-items:center;
}
.section-head.center .eyebrow{ margin-bottom:22px; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 30px; font-size:15px; font-weight:600;
  border-radius:var(--radius); border:1px solid transparent;
  cursor:pointer; transition:transform .3s var(--ease-out), box-shadow .3s var(--ease-out), background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
  white-space:nowrap;
  min-height:48px;
}
.btn--primary{ background:var(--red); color:#fff; }
.btn--primary:hover{ background:var(--red-deep); transform:translateY(-2px); box-shadow:0 16px 30px rgba(158,42,43,.34); }
.btn--ghost{ background:rgba(255,255,255,.08); color:#fff; border-color:rgba(255,255,255,.55); backdrop-filter:blur(8px); }
.btn--ghost:hover{ background:#fff; color:var(--ink); border-color:#fff; }
.btn--dark{ background:var(--ink); color:#fff; }
.btn--dark:hover{ background:#000; transform:translateY(-2px); box-shadow:var(--shadow-sm); }
.btn--line{ background:transparent; color:var(--red); border-color:var(--red); }
.btn--line:hover{ background:var(--red); color:#fff; }
.btn .arr{ transition:transform .3s var(--ease); }
.btn:hover .arr{ transform:translateX(4px); }
.btn:disabled{ opacity:.62; cursor:not-allowed; transform:none; box-shadow:none; }

.link-more{
  display:inline-flex; align-items:center; gap:7px;
  font-weight:600; color:var(--red); font-size:15px;
}
.link-more .arr{ transition:transform .3s var(--ease); }
.link-more:hover .arr{ transform:translateX(4px); }

/* =========================================================
   顶部导航
   ========================================================= */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  transition:background .35s var(--ease), box-shadow .35s var(--ease);
}
.nav__inner{
  display:flex; align-items:center; justify-content:space-between;
  height:var(--nav-h);
}
.nav__logo img{ height:34px; width:auto; transition:filter .35s var(--ease); filter:brightness(0) invert(1); }
.nav__menu{ display:flex; align-items:center; gap:36px; }
.nav__link{
  font-size:15px; font-weight:500; color:#fff;
  position:relative; padding:6px 0; transition:color .25s;
}
.nav__link::after{
  content:""; position:absolute; left:0; bottom:0; height:2px; width:0;
  background:var(--red); transition:width .3s var(--ease);
}
.nav__link:hover::after,.nav__link:focus-visible::after{ width:100%; }
.nav__cta{ padding:10px 24px; font-size:14px; }

/* 下拉 */
.nav__item{ position:relative; }
.nav__dropdown{
  position:absolute; top:calc(100% + 14px); left:50%; transform:translateX(-50%) translateY(8px);
  background:#fff; min-width:280px; border-radius:6px; padding:10px;
  box-shadow:var(--shadow); opacity:0; visibility:hidden; transition:all .26s var(--ease);
}
.nav__item:hover .nav__dropdown{ opacity:1; visibility:visible; transform:translateX(-50%) translateY(0); }
.nav__dropdown a{
  display:block; padding:11px 16px; font-size:14.5px; color:var(--ink-2);
  border-radius:4px; transition:all .2s; white-space:nowrap;
}
.nav__dropdown a:hover{ background:var(--red-tint); color:var(--red); }

/* 滚动后 / 深色文字态 */
.nav.is-solid{ background:rgba(255,255,255,.92); backdrop-filter:saturate(160%) blur(16px); box-shadow:0 1px 0 rgba(230,228,226,.9), 0 14px 34px rgba(20,20,20,.05); }
.nav.is-solid .nav__link{ color:var(--ink-2); }
.nav.is-solid .nav__logo img{ filter:none; }

/* 汉堡 */
.nav__toggle{ display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; padding:6px; }
.nav__toggle span{ width:24px; height:2px; background:#fff; transition:all .3s; }
.nav.is-solid .nav__toggle span{ background:var(--ink); }

/* =========================================================
   Hero
   ========================================================= */
.hero{
  position:relative; min-height:88svh; display:flex; align-items:center;
  color:#fff; overflow:hidden;
}
.hero__bg{ position:absolute; inset:0; z-index:-2; }
.hero__bg img{ width:100%; height:100%; object-fit:cover; }
.hero::after{
  content:""; position:absolute; inset:0; z-index:-1;
  background:
    linear-gradient(180deg, rgba(10,11,14,.72) 0%, rgba(10,11,14,.14) 32%, rgba(10,11,14,.48) 100%),
    linear-gradient(102deg, rgba(12,13,16,.9) 0%, rgba(12,13,16,.62) 46%, rgba(12,13,16,.22) 100%);
}
.hero__inner{ max-width:850px; padding:124px 0 74px; }
.hero__title{
  font-size:clamp(34px,5.4vw,66px); line-height:1.14; letter-spacing:.01em;
  text-shadow:0 2px 30px rgba(0,0,0,.3);
  text-wrap:balance;
}
.hero__title .accent{
  color:#fff; border-bottom:4px solid var(--red-bright); padding-bottom:2px;
  text-shadow:0 8px 34px rgba(158,42,43,.5);
}
.hero__sub{
  margin:28px 0 40px; font-size:clamp(16px,1.5vw,19px); line-height:1.8;
  color:rgba(255,255,255,.9); max-width:690px;
  text-wrap:pretty;
}
.hero__actions{ display:flex; gap:16px; flex-wrap:wrap; }
.hero__proof{
  display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:1px;
  width:min(700px,100%); margin-top:34px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.12);
  box-shadow:0 24px 60px rgba(0,0,0,.18);
  backdrop-filter:blur(14px) saturate(125%);
  opacity:0; transform:translateY(22px);
  animation:rise .9s var(--ease) forwards;
  animation-delay:.72s;
}
.hero__proof-item{
  padding:18px 20px 17px;
  background:rgba(12,13,16,.32);
}
.hero__proof-item strong{
  display:block; font-size:clamp(20px,2.4vw,28px); line-height:1; color:#fff;
  letter-spacing:.02em;
}
.hero__proof-item span{
  display:block; margin-top:8px; font-size:13px; color:rgba(255,255,255,.72);
  letter-spacing:.06em;
}
.hero__scroll{
  position:absolute; bottom:20px; right:clamp(24px,4vw,52px);
  color:rgba(255,255,255,.6); font-size:12px; letter-spacing:.2em;
  display:flex; flex-direction:column; align-items:flex-end; gap:8px;
}
.hero__scroll::after{ content:""; width:1px; height:40px; background:linear-gradient(rgba(255,255,255,.6),transparent); animation:scrollpulse 2s var(--ease) infinite; }
@keyframes scrollpulse{ 0%{opacity:.2;transform:scaleY(.4);transform-origin:top} 50%{opacity:1} 100%{opacity:.2;transform:scaleY(1);transform-origin:top} }

/* =========================================================
   洞察（痛点）
   ========================================================= */
.insight-grid{
  display:grid; grid-template-columns:repeat(2,1fr); gap:0;
  border-top:1px solid var(--line); border-left:1px solid var(--line);
}
.insight{
  padding:40px 38px; border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  transition:background .3s, transform .3s var(--ease-out);
}
.insight:hover{ background:var(--bg-soft); transform:translateY(-2px); }
.insight__no{ font-size:14px; font-weight:700; color:var(--red); letter-spacing:.1em; }
.insight__t{ font-size:20px; margin:14px 0 10px; }
.insight__d{ color:var(--gray); font-size:15.5px; }
.insight-quote{
  margin-top:48px; text-align:center; font-size:clamp(19px,2.2vw,26px);
  font-weight:600; line-height:1.6; color:var(--ink);
}
.insight-quote .accent{ color:var(--red); }

/* =========================================================
   服务卡
   ========================================================= */
.svc-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.svc-card{
  position:relative; overflow:hidden; border-radius:8px; min-height:460px;
  display:flex; flex-direction:column; justify-content:flex-end;
  color:#fff; isolation:isolate; box-shadow:var(--shadow-sm);
  border:1px solid rgba(255,255,255,.18);
  transition:transform .45s var(--ease-out), box-shadow .45s var(--ease-out);
}
.svc-card img{
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:-2;
  transition:transform .7s var(--ease);
}
.svc-card::after{
  content:""; position:absolute; inset:0; z-index:-1;
  background:
    linear-gradient(to top, rgba(12,12,14,.92) 4%, rgba(12,12,14,.58) 48%, rgba(12,12,14,.10) 100%),
    linear-gradient(115deg, rgba(158,42,43,.22), transparent 48%);
}
.svc-card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-lg); }
.svc-card:hover img{ transform:scale(1.07); }
.svc-card__body{ position:relative; z-index:1; padding:44px 38px; overflow:visible; }
.svc-card__no{ font-size:13px; letter-spacing:.2em; color:var(--red-soft); font-weight:700; }
.svc-card__t{
  font-size:clamp(28px,3.2vw,40px); line-height:1.14; margin:12px 0 18px;
  max-width:520px; text-wrap:balance; word-break:keep-all;
}
.svc-card__d{ font-size:15px; color:rgba(255,255,255,.82); margin-bottom:16px; max-width:420px; }
.svc-card__more{ font-size:14.5px; font-weight:600; display:inline-flex; gap:7px; align-items:center; opacity:.9; }
.svc-card__more .arr{ transition:transform .3s var(--ease); }
.svc-card:hover .svc-card__more .arr{ transform:translateX(5px); }
.svc-grid.stagger > *{ transform:translateY(42px) scale(.96); transition-duration:.9s; }
.svc-grid.stagger.is-in > *:nth-child(1){ transition-delay:.06s; }
.svc-grid.stagger.is-in > *:nth-child(2){ transition-delay:.20s; }
.svc-grid.stagger.is-in > *:nth-child(3){ transition-delay:.34s; }
.svc-grid.stagger.is-in > *:nth-child(4){ transition-delay:.48s; }
.svc-grid.stagger .svc-card__t.grow-title{ opacity:0; transform:translateY(18px) scale(1.45); }
.svc-grid.stagger.is-in > *:nth-child(1) .svc-card__t.grow-title{ animation:titleGrowDown 1.05s var(--ease-out) .14s both; }
.svc-grid.stagger.is-in > *:nth-child(2) .svc-card__t.grow-title{ animation:titleGrowDown 1.05s var(--ease-out) .28s both; }
.svc-grid.stagger.is-in > *:nth-child(3) .svc-card__t.grow-title{ animation:titleGrowDown 1.05s var(--ease-out) .42s both; }
.svc-grid.stagger.is-in > *:nth-child(4) .svc-card__t.grow-title{ animation:titleGrowDown 1.05s var(--ease-out) .56s both; }

/* 第5模块 · 展厅 AI 系统（合作产品横幅） */
.partner-band{
  margin-top:24px; position:relative; overflow:hidden; border-radius:6px;
  background:var(--bg-dark); color:#fff; isolation:isolate;
  display:grid; grid-template-columns:1.15fr 1fr; gap:0; min-height:300px;
}
.partner-band__media{ position:relative; }
.partner-band__media img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.partner-band__media img[src$="ai-link.png"]{ object-position:center; }
.partner-band__media::after{ content:""; position:absolute; inset:0;
  background:linear-gradient(90deg, rgba(20,21,24,0) 30%, var(--bg-dark) 96%); }
.partner-band__body{ padding:44px 48px; display:flex; flex-direction:column; justify-content:center; }
.partner-band__tag{ font-size:12.5px; letter-spacing:.2em; color:var(--blue);
  font-weight:700; display:inline-flex; align-items:center; gap:8px; }
.partner-band__tag img{ height:18px; filter:brightness(0) invert(1); opacity:.92; }
.partner-band__t{ font-size:26px; margin:14px 0 12px; }
.partner-band__t .accent{ color:var(--red-soft); }
.partner-band__d{ font-size:15px; color:rgba(255,255,255,.78); max-width:440px; margin-bottom:18px; line-height:1.75; }
.partner-band__caps{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:24px; }
.partner-band__caps span{ font-size:13px; padding:6px 13px; border:1px solid rgba(255,255,255,.18);
  border-radius:40px; color:rgba(255,255,255,.85); }
.partner-band__more{ font-size:14.5px; font-weight:600; color:#fff; display:inline-flex;
  gap:8px; align-items:center; align-self:flex-start; }
.partner-band__more .arr{ transition:transform .3s var(--ease); }
.partner-band:hover .partner-band__more .arr{ transform:translateX(5px); }
.partner-band--ai{
  background:linear-gradient(135deg,#101215,#171b20);
  border:1px solid rgba(255,255,255,.08);
  box-shadow:0 24px 70px rgba(10,12,16,.18);
}
.partner-band--ai .partner-band__media img{
  opacity:1; object-position:58% center;
  filter:saturate(1.14) contrast(1.05) brightness(1.12);
}
.partner-band--ai .partner-band__media::after{
  background:
    linear-gradient(90deg, rgba(16,18,21,0) 0%, rgba(16,18,21,.04) 52%, rgba(16,18,21,.78) 100%),
    linear-gradient(180deg, rgba(16,18,21,0), rgba(16,18,21,.08));
}
.partner-band--ai .partner-band__body{
  background:linear-gradient(90deg, rgba(17,19,23,.92), #121417 78%);
}
.partner-band--operation{
  display:block; min-height:0; overflow:hidden; border-radius:6px;
  background:#111418; border:1px solid rgba(255,255,255,.08);
  box-shadow:0 24px 70px rgba(10,12,16,.16);
}
.partner-band--operation .partner-band__media{
  position:absolute; inset:0;
}
.partner-band--operation .partner-band__media img{
  width:100%; height:100%; object-fit:cover; object-position:center;
  opacity:1; filter:saturate(1.05) contrast(1.03) brightness(1.04);
}
.partner-band--operation .partner-band__media::after{
  background:
    linear-gradient(90deg, rgba(8,10,13,.82) 0%, rgba(8,10,13,.62) 34%, rgba(8,10,13,.18) 68%, rgba(8,10,13,0) 100%),
    linear-gradient(180deg, rgba(8,10,13,.16), rgba(8,10,13,.10));
}
.partner-band--operation .partner-band__body{
  position:relative; z-index:2; min-height:300px; width:min(560px,58%);
  padding:48px 54px; background:transparent;
}
.partner-band--operation .partner-band__d{ max-width:520px; color:rgba(255,255,255,.82); }
.partner-band--operation .partner-band__caps span{
  background:rgba(255,255,255,.05); backdrop-filter:blur(8px);
}

/* =========================================================
   案例
   ========================================================= */
.case-tabs{ display:flex; justify-content:center; gap:10px; margin-bottom:42px; flex-wrap:wrap; }
.case-tab{
  padding:10px 22px; border:1px solid var(--line); border-radius:40px;
  font-size:14.5px; font-weight:500; color:var(--gray); cursor:pointer;
  background:#fff; transition:all .25s;
}
.case-tab:hover{ border-color:var(--red-soft); color:var(--red); }
.case-tab.is-active{ background:var(--red); border-color:var(--red); color:#fff; }

.case-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.case-card{
  border-radius:8px; overflow:hidden; background:#fff; box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease), box-shadow .35s var(--ease);
  display:flex; flex-direction:column; border:1px solid rgba(230,228,226,.76);
}
.case-card:hover{ transform:translateY(-7px); box-shadow:var(--shadow-lg); }
.case-card__media{ position:relative; aspect-ratio:16/10; overflow:hidden; }
.case-card__media img{ width:100%; height:100%; object-fit:cover; transition:transform .6s var(--ease); }
.case-card:hover .case-card__media img{ transform:scale(1.07); }
.case-card__tag{
  position:absolute; top:14px; left:14px; z-index:2;
  background:rgba(158,42,43,.94); color:#fff; font-size:12px; font-weight:600;
  padding:5px 12px; border-radius:30px; letter-spacing:.04em;
}
.case-card__body{ padding:22px 22px 26px; display:flex; flex-direction:column; gap:10px; flex:1; }
.case-card__t{ font-size:18px; }
.case-card__meta{ display:flex; gap:8px; flex-wrap:wrap; }
.case-card__meta span{ font-size:12.5px; color:var(--gray); background:var(--bg-soft); padding:3px 10px; border-radius:4px; }
.case-card__d{ font-size:14.5px; color:var(--gray); margin-top:auto; }

/* =========================================================
   三层交付模型
   ========================================================= */
.delivery{
  display:grid; grid-template-columns:repeat(3,1fr); gap:0; counter-reset:layer; position:relative;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.035);
}
.layer{ padding:44px 36px; position:relative; }
.layer:not(:last-child){ border-right:1px dashed rgba(255,255,255,.18); }
.layer__no{
  font-size:15px; font-weight:700; color:var(--red-soft); letter-spacing:.16em;
  display:flex; align-items:center; gap:12px; margin-bottom:18px;
}
.layer__no::before{ content:""; width:42px; height:42px; border:1px solid var(--red-soft); border-radius:50%;
  display:grid; place-items:center; counter-increment:layer; content:counter(layer); font-size:18px; }
.layer__t{ font-size:22px; color:#fff; margin-bottom:12px; }
.layer__d{ color:#B9BBC0; font-size:15px; }
.delivery-flow{
  display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:46px;
}
.flow-step{
  display:flex; align-items:center; gap:12px; color:#D7D8DC; font-size:15px; font-weight:500;
}
.flow-step .dot{ width:8px; height:8px; border-radius:50%; background:var(--red); }
.flow-step .sep{ color:var(--red-soft); margin:0 4px; }

/* =========================================================
   客户 / 资历
   ========================================================= */
.cred{ display:grid; grid-template-columns:1.1fr 1fr; gap:60px; align-items:center; }
.cred__stats{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin:30px 0; }
.cred__stats > div{
  padding:22px 20px; border:1px solid var(--line); background:#fff;
  box-shadow:0 12px 30px rgba(20,20,20,.04);
}
.stat__num{ font-size:clamp(34px,4vw,52px); font-weight:800; color:var(--red); line-height:1; letter-spacing:-.01em; }
.stat__num small{ font-size:.45em; font-weight:700; margin-left:2px; }
.stat__label{ font-size:14px; color:var(--gray); margin-top:8px; }
.clients{ display:flex; flex-wrap:wrap; gap:12px; }
.client-chip{
  padding:10px 18px; border:1px solid var(--line); border-radius:6px;
  font-size:14px; color:var(--ink-2); background:#fff; transition:all .25s;
}
.client-chip:hover{ border-color:var(--red-soft); color:var(--red); transform:translateY(-2px); box-shadow:var(--shadow-sm); }
.client-logo-card{
  overflow:hidden; border:1px solid var(--line); border-radius:8px; background:#fff;
  padding:clamp(18px,3vw,34px); box-shadow:0 18px 48px rgba(20,20,20,.06);
}
.client-logo-card img{ width:100%; height:auto; object-fit:contain; }
.client-logo-card--compact{ padding:26px 30px; }
.cred__tags{ display:flex; gap:14px; flex-wrap:wrap; margin-top:20px; }
.cred__tags span{ font-size:14px; color:var(--gray); display:inline-flex; align-items:center; gap:8px; }
.cred__tags span::before{ content:""; width:6px; height:6px; background:var(--red); border-radius:50%; }

/* =========================================================
   CTA 大区
   ========================================================= */
.cta-band{
  position:relative; color:#fff; text-align:center; padding:96px 0; overflow:hidden;
}
.cta-band__bg{ position:absolute; inset:0; z-index:-2; }
.cta-band__bg img{ width:100%; height:100%; object-fit:cover; }
.cta-band::after{ content:""; position:absolute; inset:0; z-index:-1; background:linear-gradient(120deg, rgba(85,18,19,.94), rgba(158,42,43,.84) 52%, rgba(20,21,24,.86)); }
.cta-band__t{ font-size:clamp(26px,3.2vw,40px); margin-bottom:14px; }
.cta-band__d{ font-size:17px; color:rgba(255,255,255,.85); margin-bottom:34px; }

/* =========================================================
   留资 CTA 细条
   ========================================================= */
.cta-strip{ background:var(--ink); color:#fff; }
.cta-strip__inner{ display:flex; align-items:center; justify-content:space-between; gap:24px; padding:34px 0; flex-wrap:wrap; }
.cta-strip__t{ font-size:22px; font-weight:700; }
.cta-strip__actions{ display:flex; gap:14px; flex-wrap:wrap; }

/* =========================================================
   页脚
   ========================================================= */
.footer{ background:#0E0F12; color:#9A9CA2; font-size:14.5px; }
.footer__main{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:40px; padding:70px 0 50px; }
.footer__logo img{ height:36px; margin-bottom:18px; filter:brightness(0) invert(1); }
.footer__slogan{ color:#C9CACE; max-width:280px; line-height:1.7; }
.footer__col h4{ color:#fff; font-size:15px; margin-bottom:18px; font-weight:600; }
.footer__col a{ display:block; padding:7px 0; color:#9A9CA2; transition:color .2s; }
.footer__col a:hover{ color:#fff; }
.footer__contact p{ padding:6px 0; color:#C9CACE; }
.footer__contact .label{ color:#76787E; font-size:13px; }
.footer__contact p a{ display:inline; padding:0; color:#E6E7EA; word-break:break-all; }
.footer__contact p a:hover{ color:#fff; }
.footer__partner{
  margin-top:14px; padding:14px 16px; border:1px solid #26282E; border-radius:6px;
  display:flex; align-items:center; gap:12px; transition:border-color .25s;
}
.footer__partner:hover{ border-color:var(--blue); }
.footer__partner img{ height:26px; filter:brightness(0) invert(1); opacity:.92; }
.footer__partner small{ display:block; color:#76787E; font-size:12px; }
.footer__bottom{ border-top:1px solid #1E2025; padding:22px 0; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; font-size:13px; color:#6C6E74; }

/* =========================================================
   服务线内页通用
   ========================================================= */
.subhero{
  position:relative; color:#fff; padding:188px 0 96px; overflow:hidden;
}
.subhero__bg{ position:absolute; inset:0; z-index:-2; }
.subhero__bg img{ width:100%; height:100%; object-fit:cover; }
.subhero::after{ content:""; position:absolute; inset:0; z-index:-1; background:linear-gradient(95deg, rgba(15,16,20,.9), rgba(15,16,20,.5)); }
.subhero__crumb{ font-size:13.5px; color:rgba(255,255,255,.65); margin-bottom:18px; letter-spacing:.04em; }
.subhero__crumb a:hover{ color:#fff; }
.subhero__title{ font-size:clamp(28px,4vw,48px); max-width:820px; }
.subhero__title .accent{ color:var(--red-soft); }
.subhero__sub{ margin-top:20px; max-width:680px; font-size:17px; color:rgba(255,255,255,.86); line-height:1.8; }

/* 痛点条 */
.painrow{ background:var(--red-tint); }
.painrow__t{ font-size:clamp(21px,2.6vw,30px); color:var(--red-deep); margin-bottom:14px; }
.painrow__d{ font-size:16.5px; color:var(--ink-2); max-width:820px; }

/* 理念 / 特性 */
.feature-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:24px; }
.feature-grid--3{ grid-template-columns:repeat(3,1fr); }
.feature{
  position:relative; overflow:hidden;
  padding:34px 32px; border:1px solid var(--line); border-radius:8px; background:#fff;
  transition:transform .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color .35s var(--ease);
}
.feature::before{
  content:""; position:absolute; left:0; right:0; top:0; height:3px;
  background:linear-gradient(90deg,var(--red),var(--gold));
  transform:scaleX(.22); transform-origin:left; transition:transform .35s var(--ease-out);
}
.feature:hover{ border-color:transparent; box-shadow:var(--shadow); transform:translateY(-5px); }
.feature:hover::before{ transform:scaleX(1); }
.feature__ic{
  width:48px; height:48px; border-radius:8px; background:linear-gradient(145deg,var(--red-tint),#fff); color:var(--red);
  display:grid; place-items:center; margin-bottom:18px; font-size:22px; font-weight:800;
  box-shadow:inset 0 0 0 1px rgba(158,42,43,.08);
}
.feature__ic--img{
  width:58px; height:58px; background:transparent; box-shadow:none; border-radius:0;
}
.feature__ic--img img{
  width:58px; height:58px; max-width:none; object-fit:contain;
}
.feature__t{ font-size:19px; margin-bottom:10px; }
.feature__d{ color:var(--gray); font-size:15px; }

/* 理念 split */
.split{ display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; }
.split--rev .split__media{ order:2; }
.split__media{ border-radius:8px; overflow:hidden; box-shadow:var(--shadow); }
.split__media img{ width:100%; aspect-ratio:16/10; object-fit:cover; transition:transform .7s var(--ease-out); }
.split__media:hover img{ transform:scale(1.04); }
.split__t{ font-size:clamp(22px,2.6vw,32px); margin-bottom:18px; }
.split__t .accent{ color:var(--red); }
.split__list{ display:flex; flex-direction:column; gap:16px; margin-top:10px; }
.split__list li{ position:relative; padding-left:30px; color:var(--ink-2); font-size:16px; }
.split__list li::before{
  content:""; position:absolute; left:0; top:9px; width:16px; height:9px;
  border-left:2px solid var(--red); border-bottom:2px solid var(--red); transform:rotate(-45deg);
}

/* 运营服务 · 痛点诊断 */
.operation-pain{
  background:linear-gradient(180deg,#fff 0%,#faf9f7 100%);
}
.operation-pain__head{
  max-width:920px; margin:0 auto clamp(34px,4vw,52px); text-align:center;
}
.operation-pain__head .eyebrow,
.operation-pain__head .split__t,
.operation-pain__lead{
  opacity:0; transform:translateY(16px);
  transition:opacity .68s var(--ease-out), transform .68s var(--ease-out);
}
.operation-pain__head.is-in .eyebrow{ opacity:1; transform:none; transition-delay:.04s; }
.operation-pain__head.is-in .split__t{ opacity:1; transform:none; transition-delay:.14s; }
.operation-pain__head.is-in .operation-pain__lead{ opacity:1; transform:none; transition-delay:.25s; }
.operation-pain__head .split__t{
  font-size:clamp(30px,3.6vw,48px); line-height:1.2; max-width:820px; margin:0 auto 18px;
}
.operation-pain__grid{
  display:grid; grid-template-columns:minmax(0,1.05fr) minmax(390px,.95fr);
  gap:clamp(30px,4vw,54px); align-items:center;
}
.operation-pain__media{
  position:relative; overflow:hidden; border-radius:8px; box-shadow:var(--shadow-lg);
  background:#201f1c; isolation:isolate;
}
.operation-pain__media::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(20,20,20,0) 52%, rgba(20,20,20,.18));
  pointer-events:none;
}
.operation-pain__media img{
  width:100%; aspect-ratio:16/10; object-fit:cover; display:block;
  transition:transform .8s var(--ease-out);
}
.operation-pain__media:hover img{ transform:scale(1.035); }
.operation-pain__punch{
  opacity:0; transform:translateY(16px);
  transition:opacity .68s var(--ease-out), transform .68s var(--ease-out);
}
.operation-pain__lead{
  color:var(--gray); font-size:16.5px; line-height:1.85; text-wrap:pretty; max-width:780px; margin:0 auto;
}
.operation-pain__copy{
  padding:clamp(22px,3vw,34px); background:rgba(255,255,255,.72);
  border:1px solid rgba(151,31,36,.10); box-shadow:0 18px 42px rgba(20,20,20,.055);
  border-radius:8px; backdrop-filter:blur(10px);
}
.operation-pain__list{
  margin-top:0;
}
.operation-pain__punch{
  position:relative; max-width:900px; margin:clamp(32px,4vw,46px) auto 0;
  padding:22px 30px 22px 34px; border-left:4px solid var(--red);
  background:linear-gradient(90deg,#fff 0%,rgba(255,255,255,.86) 100%);
  box-shadow:0 16px 38px rgba(20,20,20,.06);
  font-weight:700; color:var(--ink); font-size:18px; line-height:1.75; text-align:left;
}
.operation-pain__punch::after{
  content:""; position:absolute; right:26px; top:50%; width:88px; height:1px;
  background:linear-gradient(90deg,rgba(151,31,36,.28),rgba(151,31,36,0)); transform:translateY(-50%);
}
.operation-pain__punch.is-in{
  opacity:1; transform:none; transition-delay:.58s;
}
.operation-outcome .split__media{
  background:#061724;
}
.operation-outcome .split__media img{
  object-fit:contain; padding:0; background:#061724;
}

/* 内容升级 · 营销叙事模块 */
.narrative-section{
  background:
    linear-gradient(180deg,#fff 0%,#faf9f7 100%);
}
.narrative-showcase{
  display:grid; grid-template-columns:1fr;
  gap:clamp(28px,4vw,44px); align-items:center;
}
/* 左图右步骤的分栏版式（4:3 配图） */
.narrative-showcase--split{
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  column-gap:clamp(32px,4.5vw,56px); row-gap:clamp(26px,3.5vw,40px);
  align-items:stretch;
}
.narrative-showcase--split .narrative-head{ grid-column:1 / -1; max-width:900px; }
.narrative-visual--core{
  min-height:0; aspect-ratio:4/3; align-self:center;
}
.narrative-visual--core img{
  position:absolute; inset:0; min-height:0; height:100%;
  object-position:center;
}
.narrative-showcase--split .narrative-focus{
  display:flex; flex-direction:column; justify-content:center; gap:16px;
}
.narrative-showcase--split .narrative-steps{
  grid-template-columns:1fr; gap:14px;
}
.narrative-showcase--split .narrative-punch{ margin-top:6px; }
.narrative-head{
  max-width:880px;
}
.narrative-head .split__t{
  font-size:clamp(30px,3.8vw,48px); max-width:760px; margin-bottom:18px;
}
.narrative-head .eyebrow,
.narrative-head .split__t,
.narrative-head .narrative-lead{
  opacity:0; transform:translateY(16px);
  transition:opacity .68s var(--ease-out), transform .68s var(--ease-out);
}
.narrative-head.is-in .eyebrow{ opacity:1; transform:none; transition-delay:.02s; }
.narrative-head.is-in .split__t{ opacity:1; transform:none; transition-delay:.12s; }
.narrative-head.is-in .narrative-lead{ opacity:1; transform:none; transition-delay:.24s; }
.narrative-head .narrative-lead{
  max-width:760px;
}
.narrative-visual{
  position:relative; overflow:hidden; border-radius:8px; min-height:380px;
  box-shadow:var(--shadow-lg); background:#0f1724; isolation:isolate;
}
.narrative-visual--wide{
  min-height:0; aspect-ratio:16/7.2;
}
.narrative-visual::after{
  content:""; position:absolute; inset:0; z-index:1;
  background:
    linear-gradient(90deg, rgba(15,17,22,.18), rgba(15,17,22,0) 45%),
    linear-gradient(180deg, rgba(15,17,22,0) 48%, rgba(15,17,22,.28));
  pointer-events:none;
}
.narrative-visual img{
  width:100%; height:100%; min-height:380px; object-fit:cover;
  transition:transform .8s var(--ease-out);
}
.narrative-visual--wide img{
  position:absolute; inset:0; min-height:0; height:100%;
  object-position:center;
}
.narrative-visual:hover img{ transform:scale(1.035); }
.narrative-path{
  position:absolute; left:24px; right:24px; bottom:22px; z-index:2;
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  border:1px solid rgba(255,255,255,.22);
  background:rgba(10,12,16,.34); backdrop-filter:blur(12px);
}
.narrative-path span{
  position:relative; padding:13px 14px; color:#fff; font-size:13px; font-weight:700;
  letter-spacing:.14em; text-align:center; background:rgba(255,255,255,.08);
}
.narrative-path span::after{
  content:""; position:absolute; left:50%; right:50%; bottom:0; height:2px;
  background:var(--red-bright); transition:left .45s var(--ease-out), right .45s var(--ease-out);
}
.narrative-visual:hover .narrative-path span::after{ left:20%; right:20%; }
.narrative-copy{ max-width:560px; }
.narrative-focus{ display:grid; gap:22px; }
.narrative-copy .split__t{ font-size:clamp(28px,3vw,42px); margin-bottom:18px; }
.narrative-lead{
  color:var(--gray); font-size:16.5px; line-height:1.85; margin-bottom:24px;
  text-wrap:pretty;
}
.narrative-steps{
  display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; counter-reset:narrative;
}
.narrative-steps li{
  position:relative; display:grid; grid-template-columns:48px 1fr; column-gap:16px;
  padding:22px 22px; border:1px solid var(--line); border-radius:8px; background:#fff;
  box-shadow:0 10px 26px rgba(20,20,20,.045);
  transition:transform .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color .35s var(--ease);
}
.narrative-steps li:hover{
  transform:translateY(-3px); box-shadow:var(--shadow-sm); border-color:rgba(158,42,43,.22);
}
.narrative-step__no{
  grid-row:1 / span 2; width:48px; height:48px; display:grid; place-items:center;
  color:var(--red); background:var(--red-tint); border-radius:8px;
  font-size:13px; font-weight:800; letter-spacing:.08em;
}
.narrative-steps strong{
  color:var(--ink); font-size:17px; line-height:1.45;
}
.narrative-steps p{
  margin-top:5px; color:var(--gray); font-size:14.5px; line-height:1.7;
}
.narrative-punch{
  margin-top:2px; padding:18px 22px; border-left:3px solid var(--red); background:#fff;
  font-weight:700; color:var(--ink); font-size:17px; line-height:1.75;
  box-shadow:0 10px 26px rgba(20,20,20,.04);
}
.narrative-focus.reveal.is-in .narrative-steps li,
.narrative-focus.reveal.is-in .narrative-punch{
  animation:narrativeRise .62s var(--ease-out) both;
}
.narrative-focus.reveal.is-in .narrative-steps li:nth-child(1){ animation-delay:.08s; }
.narrative-focus.reveal.is-in .narrative-steps li:nth-child(2){ animation-delay:.18s; }
.narrative-focus.reveal.is-in .narrative-steps li:nth-child(3){ animation-delay:.28s; }
.narrative-focus.reveal.is-in .narrative-punch{ animation-delay:.42s; }
@keyframes narrativeRise{
  from{ opacity:0; transform:translateY(16px); }
  to{ opacity:1; transform:none; }
}

/* 对比 / 优势条 */
.valuebar{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.value{
  text-align:center; padding:30px 24px; border:1px solid transparent;
  transition:background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease-out);
}
.value:hover{ background:#fff; border-color:var(--line); transform:translateY(-3px); }
.value__ic{ font-size:30px; margin-bottom:14px; }
.value__t{ font-size:18px; margin-bottom:8px; color:var(--red); }
.value__d{ font-size:14.5px; color:var(--gray); }

/* Coming soon 卡 */
.soon{
  position:relative; border:1.5px dashed var(--red-soft); border-radius:10px;
  padding:48px 44px; background:linear-gradient(135deg,var(--red-tint),#fff);
  display:flex; align-items:center; justify-content:space-between; gap:30px; flex-wrap:wrap;
}
.soon__badge{
  position:absolute; top:-12px; left:44px; background:var(--red); color:#fff;
  font-size:12px; font-weight:700; letter-spacing:.16em; padding:5px 14px; border-radius:30px;
}
.soon__t{ font-size:24px; margin-bottom:10px; }
.soon__d{ color:var(--gray); max-width:560px; font-size:15.5px; }

/* AI 系统 6 能力（深色） */
.ai-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.08); border-radius:8px; overflow:hidden; }
.ai-cap{ background:var(--bg-dark); padding:34px 30px; transition:background .3s, transform .3s var(--ease-out); }
.ai-cap:hover{ background:#1B1D22; transform:translateY(-2px); }
.ai-cap__ic{ width:46px; height:46px; border-radius:10px; background:rgba(30,111,184,.16); color:#5AA9E8; display:grid; place-items:center; font-size:20px; margin-bottom:16px; }
.ai-cap__t{ font-size:18px; color:#fff; margin-bottom:8px; }
.ai-cap__d{ font-size:14px; color:#A6A8AE; }

/* =========================================================
   滚动入场动画
   ========================================================= */
.reveal{ opacity:0; transform:translateY(34px); transition:opacity .9s var(--ease-out), transform .9s var(--ease-out); will-change:opacity,transform; }
.reveal.is-in{ opacity:1; transform:none; }
.reveal[data-d="1"]{ transition-delay:.10s; }
.reveal[data-d="2"]{ transition-delay:.20s; }
.reveal[data-d="3"]{ transition-delay:.30s; }
.reveal[data-d="4"]{ transition-delay:.40s; }
.reveal[data-d="5"]{ transition-delay:.50s; }
.grow-title{
  display:block; opacity:0; transform:translate3d(0,18px,0) scale(1.45);
  transform-origin:center top; will-change:transform,opacity;
  backface-visibility:hidden;
}
.grow-title.is-in{ animation:titleGrowDown 1.05s var(--ease-out) both; }
.section-title.grow-title{
  font-size:clamp(36px,4.8vw,66px); line-height:1.16; max-width:1100px; margin-inline:auto;
  word-break:keep-all; line-break:strict;
}
.subhero__title.grow-title{
  font-size:clamp(34px,4.5vw,60px); line-height:1.18; max-width:1100px;
  word-break:keep-all; line-break:strict;
}
/* 分栏（左右布局）里的标题：巨字号不适用，回落到栏宽友好的尺寸 */
.about-grid .section-title.grow-title,
.cred .section-title.grow-title{
  font-size:clamp(28px,3.2vw,42px); line-height:1.22; max-width:none; margin-inline:0;
}
/* 大标题两行式强调：首行铺垫（略小、常色），次行核心（全尺寸、红） */
.t-lead{
  display:block; font-size:.62em; font-weight:600; letter-spacing:.04em;
  color:inherit; opacity:.86; margin-bottom:.28em;
}
.svc-card__t.grow-title{ display:block; transform-origin:left top; contain:none; }
@keyframes titleGrowDown{
  0%{ opacity:0; transform:translate3d(0,18px,0) scale(1.45); filter:blur(5px); }
  52%{ opacity:1; transform:translate3d(0,4px,0) scale(1.06); filter:blur(0); }
  100%{ opacity:1; transform:none; filter:blur(0); }
}
.quote-pop{ opacity:0; transform:translateY(22px) scale(.94); transform-origin:center; }
.quote-pop.is-in{
  animation:quotePop 1s var(--ease-out) both;
}
@keyframes quotePop{
  0%{ opacity:0; transform:translateY(24px) scale(.92); }
  58%{ opacity:1; transform:translateY(-2px) scale(1.04); }
  100%{ opacity:1; transform:none; }
}

/* 子元素错峰入场（stagger）：父级 .stagger 进入视口时，子项依次淡入上移 */
.stagger > *{ opacity:0; transform:translateY(30px) scale(.97); transition:opacity .85s var(--ease-out), transform .85s var(--ease-out); }
.stagger.is-in > *{ opacity:1; transform:none; }
.stagger.is-in > *:nth-child(1){ transition-delay:.06s; }
.stagger.is-in > *:nth-child(2){ transition-delay:.17s; }
.stagger.is-in > *:nth-child(3){ transition-delay:.28s; }
.stagger.is-in > *:nth-child(4){ transition-delay:.39s; }
.stagger.is-in > *:nth-child(5){ transition-delay:.50s; }
.stagger.is-in > *:nth-child(6){ transition-delay:.61s; }

/* Hero 文案逐行淡入上移（加载即播放） */
.hero__title,.hero__sub,.hero__actions,.hero__proof,.subhero__crumb,.subhero__title,.subhero__sub{
  opacity:0; transform:translateY(24px);
  animation:rise .9s var(--ease) forwards;
}
.hero__title{ animation-delay:.15s; }
.hero__sub{ animation-delay:.38s; }
.hero__actions{ animation-delay:.56s; }
.hero__proof{ animation-delay:.72s; }
.subhero__crumb{ animation-delay:.10s; }
.subhero__title{ animation-delay:.24s; }
.subhero__sub{ animation-delay:.42s; }
@keyframes rise{ to{ opacity:1; transform:none; } }

/* Hero 背景缓慢 Ken Burns 缓动 */
.hero__bg img,.subhero__bg img,.cta-band__bg img{ transform-origin:center; will-change:transform; }
.hero__bg img,.subhero__bg img{ animation:kenburns 22s ease-out forwards; }
@keyframes kenburns{ from{ transform:translate3d(0,var(--parallax-y,0px),0) scale(1.08); } to{ transform:translate3d(0,var(--parallax-y,0px),0) scale(1); } }

/* 流程步骤"生长"：滚动到此处依次点亮 */
.delivery-flow .flow-step,.delivery-flow .sep,
.flow .flow-step,.flow .arrow{
  opacity:0; transform:translateY(8px); transition:opacity .5s var(--ease), transform .5s var(--ease);
}
.delivery-flow.is-in .flow-step,.delivery-flow.is-in .sep,
.flow.is-in .flow-step,.flow.is-in .arrow{ opacity:1; transform:none; }
.delivery-flow.is-in .flow-step:nth-child(1){ transition-delay:.0s; }
.delivery-flow.is-in .sep:nth-child(2){ transition-delay:.18s; }
.delivery-flow.is-in .flow-step:nth-child(3){ transition-delay:.28s; }
.delivery-flow.is-in .sep:nth-child(4){ transition-delay:.46s; }
.delivery-flow.is-in .flow-step:nth-child(5){ transition-delay:.56s; }
.delivery-flow.is-in .sep:nth-child(6){ transition-delay:.74s; }
.delivery-flow.is-in .flow-step:nth-child(7){ transition-delay:.84s; }

/* 数字滚动占位（JS 写入），保持等宽不跳动 */
.count{ font-variant-numeric:tabular-nums; }

/* 案例 Tab 切换淡入 */
.case-grid.is-switching{ opacity:.25; transition:opacity .2s var(--ease); }
.case-grid{ transition:opacity .35s var(--ease); }

/* 按钮光泽微交互 */
.btn--primary{ position:relative; overflow:hidden; }
.btn--primary::after{
  content:""; position:absolute; top:0; left:-130%; width:60%; height:100%;
  background:linear-gradient(100deg, transparent, rgba(255,255,255,.28), transparent);
  transform:skewX(-18deg); transition:left .6s var(--ease);
}
.btn--primary:hover::after{ left:130%; }

/* 页面载入淡入，避免白屏闪烁 */
body{ opacity:0; transition:opacity .5s var(--ease); }
body.is-ready{ opacity:1; }

/* 无障碍：尊重"减少动效" */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{ animation-duration:.001ms !important; animation-delay:0ms !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
  .reveal,.stagger > *{ opacity:1 !important; transform:none !important; }
  .hero__title,.hero__sub,.hero__actions,.hero__proof,.subhero__crumb,.subhero__title,.subhero__sub{ opacity:1 !important; transform:none !important; }
  .narrative-focus.reveal.is-in .narrative-steps li,
  .narrative-focus.reveal.is-in .narrative-punch{ animation:none !important; }
  .grow-title{ opacity:1 !important; transform:none !important; animation:none !important; filter:none !important; }
  .quote-pop{ opacity:1 !important; transform:none !important; animation:none !important; }
  body{ opacity:1 !important; }
}

/* =========================================================
   AI 升级 · 接待前中后旅程（时间轴）
   ========================================================= */
.journey{ position:relative; }
.journey::before{
  content:""; position:absolute; left:6px; top:14px; bottom:14px; width:2px;
  background:linear-gradient(var(--red), rgba(158,42,43,.12));
}
.phase{
  display:grid; grid-template-columns:170px 1fr; gap:44px;
  padding:44px 0 44px 38px; position:relative;
}
.phase + .phase{ border-top:1px solid var(--line); }
.phase::before{
  content:""; position:absolute; left:0; top:58px; width:14px; height:14px;
  border-radius:50%; background:var(--red); box-shadow:0 0 0 5px var(--red-tint);
}
.phase__num{ font-size:13px; font-weight:700; letter-spacing:.2em; color:var(--red-soft); }
.phase__stage{ font-size:26px; margin:8px 0 8px; color:var(--ink); }
.phase__lead{ font-size:14.5px; color:var(--gray); }
.phase__cols{ display:grid; grid-template-columns:1fr 1fr; gap:18px; align-items:stretch; }
.phase__pain,.phase__solve{ padding:24px 26px; border-radius:8px; }
.phase__pain{ background:var(--bg-soft); border:1px solid var(--line); }
.phase__solve{ background:var(--red-tint); border:1px solid #EAD5D4; }
.phase__lbl{ display:inline-block; font-size:12.5px; font-weight:700; letter-spacing:.12em; color:var(--gray-3); margin-bottom:10px; }
.phase__lbl--red{ color:var(--red); }
.phase__pain p{ color:var(--ink-2); font-size:15px; line-height:1.75; }
.phase__solve p{ color:var(--ink); font-size:15px; line-height:1.75; }
.phase__tags{ display:flex; flex-wrap:wrap; gap:9px; align-items:center; margin-top:18px; }
.phase__tagk{ font-size:12px; font-weight:700; letter-spacing:.1em; color:var(--gray-3); }
.phase__tags span:not(.phase__tagk){
  font-size:13px; padding:6px 13px; border:1px dashed var(--line);
  border-radius:40px; color:var(--gray); background:#fff;
}
.value-line{
  margin-top:8px; text-align:center; font-size:clamp(19px,2.2vw,26px);
  font-weight:600; line-height:1.6; color:var(--ink);
}
.value-line .accent{ color:var(--red); }

/* =========================================================
   Hero 视频背景
   ========================================================= */
.hero__video{
  position:absolute; inset:0; z-index:-2; width:100%; height:100%;
  object-fit:cover; pointer-events:none; transform:translate3d(0,var(--parallax-y,0px),0) scale(1.04);
  will-change:transform;
}
@media (prefers-reduced-motion: reduce){ .hero__video{ display:none; } }

/* =========================================================
   内容升级 · 视频演示卡
   ========================================================= */
.demo-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.demo{
  background:#fff; border:1px solid var(--line); border-radius:12px; overflow:hidden;
  box-shadow:var(--shadow-sm); display:flex; flex-direction:column;
  transition:transform .4s var(--ease), box-shadow .4s var(--ease);
}
.demo:hover{ transform:translateY(-6px); box-shadow:var(--shadow); }
.demo__media{ aspect-ratio:5/4; background:#0e0f12; overflow:hidden; position:relative; }
.demo__media video,.demo__media img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .65s var(--ease-out); }
.demo:hover .demo__media video,.demo:hover .demo__media img{ transform:scale(1.045); }
.demo__tag{
  position:absolute; top:12px; left:12px; z-index:2; font-size:11.5px; font-weight:700;
  letter-spacing:.08em; color:#fff; background:rgba(158,42,43,.92); padding:5px 11px; border-radius:40px;
}
.demo__body{ padding:22px 22px 24px; }
.demo__t{ font-size:17px; margin-bottom:8px; color:var(--ink); }
.demo__d{ font-size:14px; color:var(--gray); line-height:1.72; }

/* =========================================================
   客户 LOGO 墙
   ========================================================= */
.logo-wall{ display:grid; grid-template-columns:repeat(6,1fr); gap:14px; }
.logo-wall__item{
  background:#fff; border:1px solid var(--line); border-radius:8px; height:92px;
  display:grid; place-items:center; padding:14px 18px;
  transition:box-shadow .3s var(--ease), transform .3s var(--ease);
}
.logo-wall__item:hover{ box-shadow:var(--shadow-sm); transform:translateY(-3px); }
.logo-wall__item img{
  max-height:46px; max-width:100%; object-fit:contain;
  filter:none; opacity:1; transition:opacity .35s var(--ease), transform .35s var(--ease);
}
.logo-wall__item:hover img{ opacity:1; transform:scale(1.02); }

/* =========================================================
   痛点列表（分页痛点排版 + 逐条入场）
   ========================================================= */
.painlist{ display:flex; flex-direction:column; margin-top:14px; }
.painlist li{
  position:relative; padding:16px 0 16px 40px; border-top:1px solid var(--line);
  color:var(--ink-2); font-size:16px; line-height:1.7;
  opacity:0; transform:translateY(12px); transition:opacity .55s var(--ease), transform .55s var(--ease);
}
.painlist li:last-child{ border-bottom:1px solid var(--line); }
.painlist li::before{
  content:""; position:absolute; left:6px; top:20px; width:16px; height:16px;
  border-radius:50%; background:var(--red-tint);
  background-image:linear-gradient(45deg,transparent 44%,var(--red) 44%,var(--red) 56%,transparent 56%),
                   linear-gradient(-45deg,transparent 44%,var(--red) 44%,var(--red) 56%,transparent 56%);
}
.painlist li strong{ color:var(--ink); font-weight:700; }
.reveal.is-in .painlist li{ opacity:1; transform:none; }
.reveal.is-in .painlist li:nth-child(1){ transition-delay:.12s; }
.reveal.is-in .painlist li:nth-child(2){ transition-delay:.22s; }
.reveal.is-in .painlist li:nth-child(3){ transition-delay:.32s; }
.reveal.is-in .painlist li:nth-child(4){ transition-delay:.42s; }
.reveal.is-in .painlist li:nth-child(5){ transition-delay:.52s; }

/* 时间轴 phase：痛点/解决 卡片逐个入场 + phase 配图 */
.phase.reveal .phase__pain,.phase.reveal .phase__solve{ opacity:0; transform:translateY(14px); transition:opacity .6s var(--ease), transform .6s var(--ease); }
.phase.reveal.is-in .phase__pain{ transition-delay:.1s; opacity:1; transform:none; }
.phase.reveal.is-in .phase__solve{ transition-delay:.24s; opacity:1; transform:none; }
.phase.reveal .phase__tags span{ opacity:0; transform:translateY(6px); transition:opacity .4s var(--ease), transform .4s var(--ease); }
.phase.reveal.is-in .phase__tags span{ opacity:1; transform:none; }
.phase.reveal.is-in .phase__tags span:nth-child(2){ transition-delay:.34s; }
.phase.reveal.is-in .phase__tags span:nth-child(3){ transition-delay:.42s; }
.phase.reveal.is-in .phase__tags span:nth-child(4){ transition-delay:.5s; }
.phase__fig{ margin-top:20px; border-radius:8px; overflow:hidden; border:1px solid var(--line); }
.phase__fig img{ width:100%; display:block; aspect-ratio:16/8; object-fit:cover; }

@media (prefers-reduced-motion: reduce){
  .painlist li,.phase.reveal .phase__pain,.phase.reveal .phase__solve,.phase.reveal .phase__tags span{ opacity:1 !important; transform:none !important; }
  .operation-pain__copy .eyebrow,
  .operation-pain__copy .split__t,
  .operation-pain__lead,
  .operation-pain__punch{ opacity:1 !important; transform:none !important; }
}

/* =========================================================
   关于 / 联系 表单
   ========================================================= */
.about-grid{ display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:start; }
.about-grid p.lead{ color:var(--gray); font-size:16.5px; line-height:1.85; }
.adv-grid{ display:grid; grid-template-columns:1fr 1fr; gap:18px; margin-top:6px; }
.adv{ padding:24px 26px; background:var(--bg-soft); border:1px solid var(--line); border-radius:8px; transition:transform .35s var(--ease), box-shadow .35s var(--ease); }
.adv:hover{ transform:translateY(-4px); box-shadow:var(--shadow-sm); }
.adv__t{ font-size:17px; margin-bottom:8px; color:var(--ink); }
.adv__t::before{ content:""; display:inline-block; width:8px; height:8px; border-radius:2px; background:var(--red); margin-right:9px; vertical-align:middle; }
.adv__d{ font-size:14.5px; color:var(--gray); }

.contact{ display:grid; grid-template-columns:1.1fr .9fr; gap:56px; align-items:start; }
.lead-form{ background:#fff; border:1px solid var(--line); border-radius:10px; padding:34px; box-shadow:var(--shadow-sm); }
/* 蜜罐字段：对真实用户隐藏，机器人易误填 */
.hp-field{ position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }
.field{ margin-bottom:18px; }
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.field label{ display:block; font-size:13.5px; color:var(--ink-2); margin-bottom:7px; font-weight:600; }
.field input,.field select,.field textarea{
  width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:6px;
  font-family:inherit; font-size:15px; color:var(--ink); background:#fff; transition:border-color .2s, box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{ outline:none; border-color:var(--red-soft); box-shadow:0 0 0 3px var(--red-tint); }
.field textarea{ resize:vertical; min-height:104px; }
.contact-info h3{ font-size:20px; margin-bottom:18px; }
.contact-info p{ margin-bottom:18px; color:var(--ink-2); }
.contact-info p a{ color:var(--red); font-weight:600; }
.contact-info .label{ font-size:13px; color:var(--gray-3); letter-spacing:.08em; }
.wechat-card{
  display:flex; gap:18px; align-items:center; margin:10px 0 22px; padding:18px;
  border:1px solid var(--line); border-radius:8px; background:var(--bg-soft);
}
.wechat-card img{
  width:140px; height:auto; object-fit:contain; flex:0 0 auto;
  border:1px solid var(--line); border-radius:8px; background:#fff;
}
.wechat-card p{ margin:8px 0 0; font-size:14.5px; color:var(--ink-2); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 980px){
  .section{ padding:72px 0; }
  .cred{ grid-template-columns:1fr; gap:36px; }
  .delivery{ grid-template-columns:1fr; }
  .layer:not(:last-child){ border-right:0; border-bottom:1px dashed rgba(255,255,255,.18); }
  .split,.split--rev .split__media{ grid-template-columns:1fr; order:0; }
  .split{ gap:30px; }
  .operation-pain__grid{ grid-template-columns:1fr; }
  .operation-pain__copy{ max-width:none; }
  .narrative-showcase,.narrative-showcase--split{ grid-template-columns:1fr; }
  .narrative-copy,.narrative-head{ max-width:none; }
  .footer__main{ grid-template-columns:1fr 1fr; gap:30px; }
  .feature-grid--3{ grid-template-columns:repeat(3,1fr); }
  .demo-grid{ grid-template-columns:repeat(2,1fr); }
  .logo-wall{ grid-template-columns:repeat(4,1fr); }
}
@media (max-width: 760px){
  .nav__menu{
    position:fixed; inset:var(--nav-h) 0 auto 0; background:#fff; flex-direction:column;
    align-items:stretch; gap:0; padding:10px 0; box-shadow:var(--shadow);
    transform:translateY(calc(-100% - var(--nav-h))); opacity:0; visibility:hidden; pointer-events:none;
    transition:transform .35s var(--ease), opacity .25s var(--ease), visibility .35s var(--ease);
    height:auto;
  }
  .nav__menu.is-open{ transform:translateY(0); opacity:1; visibility:visible; pointer-events:auto; }
  .nav__link{ color:var(--ink-2); padding:14px 24px; }
  .nav__link::after{ display:none; }
  .nav__item{ padding:0 24px; }
  .nav__dropdown{ position:static; transform:none; box-shadow:none; opacity:1; visibility:visible; padding:0 0 8px 12px; min-width:auto; }
  .nav__cta{ margin:12px 24px; text-align:center; justify-content:center; }
  .nav__toggle{ display:flex; }
  .svc-grid,.case-grid,.feature-grid,.feature-grid--3,.valuebar,.ai-grid,.insight-grid,.cred__stats{ grid-template-columns:1fr; }
  .demo-grid{ grid-template-columns:1fr 1fr; }
  .logo-wall{ grid-template-columns:repeat(3,1fr); }
  .phase{ grid-template-columns:1fr; gap:18px; padding:34px 0 34px 0; }
  .phase::before,.journey::before{ display:none; }
  .phase__cols{ grid-template-columns:1fr; }
  .about-grid,.contact,.adv-grid,.field-row{ grid-template-columns:1fr; }
  .about-grid,.contact{ gap:34px; }
  .lead-form{ padding:24px; }
  .partner-band{ grid-template-columns:1fr; }
  .partner-band__media{ min-height:200px; }
  .partner-band__media::after{ background:linear-gradient(180deg, rgba(20,21,24,0) 40%, var(--bg-dark) 96%); }
  .partner-band--ai .partner-band__media::after{ background:linear-gradient(180deg, rgba(16,18,21,.02) 0%, rgba(16,18,21,.82) 100%); }
  .partner-band--ai .partner-band__body{ background:#121417; }
  .partner-band--operation{ display:block; }
  .partner-band--operation .partner-band__media{ position:absolute; min-height:0; }
  .partner-band--operation .partner-band__media img{ object-position:68% center; }
  .partner-band--operation .partner-band__media::after{
    background:linear-gradient(180deg, rgba(8,10,13,.60) 0%, rgba(8,10,13,.86) 64%, rgba(8,10,13,.94) 100%);
  }
  .partner-band--operation .partner-band__body{
    width:100%; min-height:360px; padding:36px 26px; justify-content:flex-end;
  }
  .partner-band__body{ padding:32px 26px; }
  .insight-grid{ border-left:0; }
  .insight{ border-right:0; }
  .footer__main{ grid-template-columns:1fr; }
  .hero{ min-height:92svh; }
  .hero__inner{ padding:108px 0 58px; }
  .hero__proof{ grid-template-columns:repeat(3,minmax(0,1fr)); margin-top:24px; }
  .hero__proof-item{ padding:12px 10px; }
  .hero__proof-item strong{ font-size:19px; }
  .hero__proof-item span{ font-size:11.5px; line-height:1.45; letter-spacing:.02em; }
  .hero__scroll{ display:none; }
  .section-head{ margin-bottom:38px; }
  .svc-card{ min-height:430px; }
  .svc-card__body{ padding:34px 28px; }
  .svc-card__t{ font-size:clamp(26px,7.4vw,34px); }
  .section-title.grow-title{ font-size:clamp(30px,8.4vw,44px); line-height:1.22; }
  .subhero__title.grow-title{ font-size:clamp(28px,8vw,42px); line-height:1.24; }
  .operation-pain__media img{ aspect-ratio:16/11; }
  .narrative-visual{ min-height:280px; }
  .narrative-visual img{ min-height:280px; }
  .narrative-visual--wide,
  .narrative-visual--wide img{ min-height:300px; }
  .narrative-visual--wide{ aspect-ratio:auto; min-height:300px; }
  .narrative-path{ left:14px; right:14px; bottom:14px; }
  .narrative-steps{ grid-template-columns:1fr; }
  .narrative-steps li{ grid-template-columns:42px 1fr; padding:16px; column-gap:13px; }
  .narrative-step__no{ width:42px; height:42px; font-size:12px; }
  .cta-strip__inner{ flex-direction:column; align-items:flex-start; }
}

@media (max-width: 420px){
  .btn{ width:100%; justify-content:center; }
  .hero__actions{ width:100%; }
  .demo-grid,.logo-wall{ grid-template-columns:1fr; }
  .section-title{ font-size:25px; }
  .section-title.grow-title{ font-size:32px; }
  .subhero__title.grow-title{ font-size:34px; }
  .svc-card__t{ font-size:30px; }
  .hero__title{ font-size:32px; }
  .narrative-path span{ padding:11px 8px; font-size:12px; letter-spacing:.08em; }
  .narrative-head .split__t,.narrative-copy .split__t{ font-size:27px; }
}