/* ============================================================
   亮品牌 L brand · 设计系统 v2
   瑞士国际主义（Swiss Modern）· 白 / 真黑 / 信号红
   品牌基因即配色：Logo 的白、真黑与正红
   质感层：grain 噪点 · vignette 暗角 · 灰度影像 · 发丝网格
   ============================================================ */

:root {
  /* ---- 色（三段式命名：名称(hex) — 功能与约束）---- */
  --bg:        #FBFBFD;              /* Paper White — 页面底色，中性微暖，不用纯白 */
  --surface:   #FFFFFF;              /* Sheet — 抬升面（卡片/表头） */
  --ink:       #1D1D1F;              /* True Black — 标题与主文字，对比 ≥ 16:1 */
  --ink-2:     #6E6E73;              /* Graphite — 正文灰，对比 ≥ 9:1 */
  --ink-3:     #86868B;              /* Ash — 辅助文字 */
  --ink-4:     #D2D2D7;              /* Mist — 极浅分隔/装饰 */              /* Ash — 辅助与元信息，对比 ≥ 3.5:1 */
  --accent:    #E01B24;              /* Signal Red — 唯一强调色 */
  --accent-dp: #A8121A;              /* Deep Signal — 深底上的红 */
  --dark:      #0A0A0A;              /* Void Black — 深色区块底 */
  --on-dark:   #F2F2F0;              /* Star White — 深底文字 */
  --on-dark-2: #A8A8A4;              /* Star Muted — 深底次级文字 */
  --line:        rgba(0, 0, 0, .08);   /* Hairline — 发丝线（半透明，不用实心 #ccc） */
  --line-strong: rgba(0, 0, 0, .16);   /* Hairline Strong — 结构线 */
  --line-dark:   rgba(242, 242, 240, .13);/* Hairline on Void */
  --shadow-sm: 0 4px 18px -8px rgba(0, 0, 0, .10);  /* 染色阴影，非纯黑 */
  --shadow-lg: 0 24px 60px -28px rgba(0, 0, 0, .18);

  /* ---- 字 ---- */
  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* ---- 节奏 ---- */
  --wrap: 1280px;
  --gutter: clamp(20px, 4.5vw, 52px);
  --sec: clamp(84px, 11vw, 164px);
  --ease: cubic-bezier(.16, 1, .3, 1);


  /* ---- 体验层令牌（对标苹果的节奏与舒适度）---- */
  --radius-card: 18px;     /* 卡片 */
  --radius-img: 12px;      /* 图片 */
  --radius-pill: 980px;    /* 按钮 / 标签 */
  --lh-display: 1.12;      /* 超大标题行高（中文比拉丁文需要更松）*/
  --lh-title: 1.26;        /* 区块标题行高（中文多行需要更松）*/
  --lh-body: 1.62;         /* 正文行高（偏紧，阅读更稳） */
  --track-display: -.018em;
  --track-title: -.018em;
  --dur-fast: .3s;
  --dur: .6s;
  --dur-slow: .9s;
  --sp-1: 8px;  --sp-2: 16px; --sp-3: 24px; --sp-4: 32px;
  --sp-5: 48px; --sp-6: 64px; --sp-7: 96px; --sp-8: 128px;

  /* ---- 字级（默认值；后台「设计设置」可整体调整，运行时由 JS 覆盖）---- */
  --fs-h1: clamp(30px, 5vw, 66px);
  --fs-h2: clamp(24px, 4.2vw, 56px);
  --fs-h3: clamp(18px, 2.1vw, 24px);
  --fs-body: 16px;
  --fs-small: 13px;
  --radius: 0px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: var(--lh-body);
  letter-spacing: .005em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 板块背景图：统一遮罩保证文字可读（遮罩浓度由板块自己的 bg.overlay 控制） */
[data-bgimg] { position: relative; }
[data-bgimg]::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: rgba(10, 10, 10, var(--ov, .42));
}
[data-bgimg] > .wrap { position: relative; z-index: 2; }
[data-bgimg] .sec-title, [data-bgimg] h2, [data-bgimg] h3 { color: #fff; }
[data-bgimg] .sec-lead, [data-bgimg] p { color: rgba(255, 255, 255, .82); }

/* ---- 质感层：grain 噪点（廉价感与高级感的分界线）---- */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: .028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.wrap, .nav, .footer, .cta { position: relative; z-index: 5; }

/* 基础 reset：清除浏览器默认外边距 ——
   此前遗留 <figure> 默认 margin:1em 40px，导致 hero 图片在单列布局下左右各内缩 40px，
   与同级文字不对齐（三端不一致的根因之一）。这里一次性统一所有块级元素的默认边距。 */
figure, blockquote, dl, dd, dt, ul, ol, table, hr, fieldset { margin: 0; }
ul, ol { padding-left: 0; list-style: none; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
h1, h2, h3, h4 {
  margin: 0; color: var(--ink); font-family: var(--serif); font-weight: 900;
  line-height: var(--lh-title); letter-spacing: var(--track-title);
  text-wrap: balance;   /* 多行标题自动均衡每行长度，避免末行孤字 */
}
h3, h4 { font-weight: 600; line-height: 1.3; letter-spacing: -.01em; }
p { margin: 0; }
::selection { background: var(--accent); color: #fff; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- 通用排版元件 ---------- */
/* eyebrow 小标签：全站最多 3 处，不在每个板块重复 */
.label {
  display: inline-block;
  font-family: var(--sans); font-size: 11.5px; font-weight: 500;
  letter-spacing: .24em; text-transform: uppercase; color: var(--ink-3);
}
.label.red { color: var(--accent); }
.label.with-bar { display: inline-flex; align-items: center; gap: 12px; }
.label.with-bar::before { content: ""; width: 22px; height: 1px; background: var(--accent); }

.sec-title { font-size: var(--fs-h2); }
.sec-title em { font-style: normal; color: var(--accent); }
.sec-lead { max-width: 640px; margin-top: 18px; font-size: clamp(16px, 1.3vw, 18.5px); font-weight: 400; line-height: 1.62; color: var(--ink-2); }
.sec-head { margin-bottom: clamp(40px, 5.5vw, 76px); }
.sec-head .label + .sec-title { margin-top: 20px; }

.tlink {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 15px; font-weight: 500; letter-spacing: 0; color: var(--accent);
  transition: opacity var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.tlink .arr { transition: transform .35s var(--ease); }
.tlink:hover { text-decoration: underline; text-underline-offset: 3px; }
.tlink:hover .arr { transform: translateX(5px); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 60;
  border-bottom: 1px solid transparent;
  transition: background .4s var(--ease), border-color .4s var(--ease);
}
.nav.scrolled {
  background: rgba(245, 245, 243, .86);
  backdrop-filter: blur(16px) saturate(1.15);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  border-bottom-color: var(--line);
}
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.nav-logo img { height: 28px; width: auto; }
.nav-links { display: flex; align-items: center; gap: clamp(16px, 2.8vw, 38px); }
.nav-links a { position: relative; font-size: 14.5px; font-weight: 400; color: var(--ink); letter-spacing: .04em; padding: 5px 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1.5px; width: 100%;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--accent); }
.nav-cta {
  font-size: 12.5px !important; font-weight: 500; letter-spacing: .16em;
  color: var(--on-dark) !important; background: var(--ink);
  padding: 11px 22px !important; transition: background .3s var(--ease);
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent); }
.nav-burger { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav-burger span { display: block; width: 22px; height: 1.5px; background: var(--ink); margin: 5px 0; transition: .3s; }

/* ---------- HERO（图文分栏 + 灰度影像 + 暗角）---------- */
.hero { position: relative; padding: clamp(116px, 14vh, 156px) 0 clamp(52px, 6vw, 88px); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: clamp(26px, 4.4vw, 64px); align-items: end; }
.hero-kicker { display: flex; align-items: center; gap: 14px; font-size: 11.5px; font-weight: 500; letter-spacing: .26em; color: var(--ink-3); text-transform: uppercase; }
.hero-kicker i { width: 30px; height: 1px; background: var(--accent); }
.hero h1 { font-size: var(--fs-h1); line-height: var(--lh-display); letter-spacing: var(--track-display); margin: 24px 0 0; text-wrap: balance; }
.hero-grid.no-figure { grid-template-columns: 1fr; }
.hero-grid.no-figure .hero-lead { max-width: 620px; }
.hero-grid.no-figure h1 { max-width: 17em; }
.hero h1 .dot { color: var(--accent); }
.hero-lead { margin-top: 26px; max-width: 540px; font-size: clamp(16.5px, 1.45vw, 20px); font-weight: 400; line-height: 1.58; color: var(--ink-2); }
.hero-actions { display: flex; gap: 14px; margin-top: 42px; flex-wrap: wrap; }
.hero-figure { position: relative; }
.hero-figure img {
  width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: var(--radius-card);
  transition: transform 1.1s var(--ease);
}
.hero-figure:hover img { transform: scale(1.01); }
.hero-figure::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 92% 74% at 50% 42%, transparent 48%, rgba(10, 10, 10, .32) 100%);
}
.hero-figure figcaption { margin-top: 12px; font-size: 11px; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; display: flex; justify-content: space-between; gap: 16px; }
.hero-rule { margin-top: clamp(42px, 6vw, 74px); border-top: 1px solid var(--line-strong); padding-top: 20px; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; font-size: 11px; letter-spacing: .2em; color: var(--ink-3); text-transform: uppercase; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; font-size: 14px; font-weight: 500; letter-spacing: .02em;
  border: 1px solid var(--ink); color: var(--ink); background: transparent;
  border-radius: var(--radius-pill);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  cursor: pointer;
}
.btn .arr { transition: transform .35s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--ink); color: var(--on-dark); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.on-dark { border-color: var(--on-dark); color: var(--on-dark); }
.btn.on-dark:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- 数据带（Swiss 表格化）---------- */
.stats { border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.stats-in { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: clamp(30px, 4vw, 54px) clamp(18px, 2.4vw, 36px); border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat-num {
  display: flex; align-items: baseline; gap: 3px;
  font-family: var(--serif); font-weight: 900; font-size: clamp(40px, 4.8vw, 72px);
  color: var(--ink); line-height: 1; letter-spacing: var(--track-display);
  font-variant-numeric: tabular-nums;
}
.stat-num s { text-decoration: none; color: var(--accent); font-size: .52em; letter-spacing: 0; }
.stat-label { margin-top: 14px; font-size: 13px; font-weight: 400; letter-spacing: .04em; color: var(--ink-2); }

/* ---------- 六亮体系（品牌核心资产）---------- */
.method-stage { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: clamp(16px, 3vw, 40px); margin: clamp(44px, 6vw, 76px) 0 clamp(24px, 3vw, 40px); }
.method-slogan { font-family: var(--serif); font-weight: 600; font-size: clamp(17px, 2vw, 25px); color: var(--ink); letter-spacing: -.01em; line-height: 1.6; }
.method-slogan.left { text-align: right; }
.method-slogan.left::after { content: ""; display: block; width: 40px; height: 2px; background: var(--accent); margin: 14px 0 0 auto; }
.method-slogan.right::before { content: ""; display: block; width: 40px; height: 2px; background: var(--accent); margin-bottom: 14px; }
.method-ring { position: relative; width: min(540px, 80vw); aspect-ratio: 1; margin: 0 auto; }
.method-ring::before { content: ""; position: absolute; inset: 12%; border: 1px dashed var(--line-strong); border-radius: 50%; }
.method-ring::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpolygon points='50,4 89.9,27 89.9,73 50,96 10.1,73 10.1,27' fill='none' stroke='rgba(13,13,13,0.2)' stroke-width='0.35'/%3E%3C/svg%3E");
  background-size: contain; background-repeat: no-repeat; background-position: center;
}
.ring-core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 30%; aspect-ratio: 1; border-radius: 50%;
  background: var(--dark); color: var(--on-dark);
  display: flex; align-items: center; justify-content: center; text-align: center;
  font-family: var(--serif); font-weight: 600; font-size: clamp(14px, 1.8vw, 20px); letter-spacing: .06em;
  box-shadow: 0 0 0 8px var(--bg), 0 0 0 9px var(--line-strong), var(--shadow-lg);
  z-index: 2; padding: 8px; line-height: 1.4;
}
.ring-core::after { content: ""; position: absolute; inset: 8px; border-radius: 50%; border: 1px solid rgba(224, 27, 36, .5); pointer-events: none; }
.hex-node {
  position: absolute; top: 50%; left: 50%; width: 23%;
  --hexR: min(238px, 30vw);
  transform: translate(-50%, -50%) rotate(calc(var(--i, 0) * 60deg)) translateY(calc(-1 * var(--hexR))) rotate(calc(var(--i, 0) * -60deg));
  z-index: 1;
}
.hex-node-in {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-img);
  padding: 14px 10px 12px; text-align: center;
  transition: background .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
  box-shadow: var(--shadow-sm);
}
.hex-node-in:hover { background: var(--ink); border-color: var(--ink); }
.hex-node-in:hover b { color: var(--on-dark); }
.hex-node-in:hover i { color: var(--accent); }
.hex-node-in:hover p { color: var(--on-dark-2); }
.hex-node-in b { display: block; font-family: var(--serif); font-weight: 600; font-size: clamp(14px, 1.6vw, 17px); color: var(--ink); letter-spacing: .04em; transition: color .4s var(--ease); }
.hex-node-in i { display: block; font-style: normal; font-size: 9px; font-weight: 500; letter-spacing: .2em; color: var(--accent); margin-top: 4px; text-transform: uppercase; transition: color .4s var(--ease); }
.hex-node-in p { font-size: 10.5px; line-height: 1.55; color: var(--ink-3); margin-top: 7px; transition: color .4s var(--ease); }

/* 价值原则 → 编号行（非等大卡片） */
.values { border-top: 1px solid var(--line-strong); margin-top: clamp(40px, 5vw, 64px); }
.value-row {
  display: grid; grid-template-columns: 74px 1fr 1.5fr; gap: clamp(16px, 3vw, 48px);
  align-items: baseline; padding: clamp(22px, 3vw, 34px) 0; border-bottom: 1px solid var(--line);
  transition: padding-left .4s var(--ease);
}
.value-row:hover { padding-left: 12px; }
.value-no { font-family: var(--serif); font-weight: 900; font-size: 15px; color: var(--accent); letter-spacing: .1em; }
.value-title { font-family: var(--serif); font-weight: 900; font-size: var(--fs-h3); color: var(--ink); letter-spacing: -.01em; }
.value-desc { font-size: 14.5px; font-weight: 300; color: var(--ink-2); line-height: 1.9; }

/* ---------- 服务体系（Swiss 表格）---------- */
.svc-table { border-top: 1px solid var(--ink); }
.svc-row {
  display: grid; grid-template-columns: 70px 1.1fr 1.6fr auto; gap: clamp(14px, 2.6vw, 40px);
  align-items: center; padding: clamp(20px, 2.8vw, 32px) 0;
  border-bottom: 1px solid var(--line); position: relative;
  transition: padding-left .4s var(--ease);
}
.svc-table a.svc-row:hover { padding-left: 12px; }
.svc-table a.svc-row::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: var(--accent); transform: scaleY(0); transition: transform .4s var(--ease);
}
.svc-table a.svc-row:hover::before { transform: scaleY(1); }
.svc-no { font-size: 11.5px; font-weight: 500; letter-spacing: .16em; color: var(--ink-3); text-transform: uppercase; }
.svc-name { font-family: var(--serif); font-weight: 600; font-size: var(--fs-h3); color: var(--ink); letter-spacing: -.01em; }
.svc-essence { font-size: 11.5px; letter-spacing: .2em; color: var(--accent); margin-top: 5px; text-transform: uppercase; }
.svc-desc { font-size: 14px; font-weight: 300; color: var(--ink-2); line-height: 1.8; }
.svc-period { font-size: 12.5px; letter-spacing: .1em; color: var(--ink-3); white-space: nowrap; font-variant-numeric: tabular-nums; }

/* ---------- 案例（规整三列等大网格 · 图片统一 3:2 · 灰度影像）---------- */
.case-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  column-gap: clamp(20px, 2.4vw, 34px);
  row-gap: clamp(36px, 3.8vw, 56px);
}
.case-card { display: block; transition: transform var(--dur-fast) var(--ease); }
.case-card:hover { transform: translateY(-4px); }
.case-cover {
  position: relative; overflow: hidden; background: var(--surface);
  aspect-ratio: 3 / 2; border-radius: var(--radius-card);
}
.case-cover img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.1s var(--ease);
}
.case-card:hover .case-cover img { transform: scale(1.03); }
.case-cover .noimg { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-weight: 900; font-size: 40px; color: var(--ink-3); letter-spacing: .2em; }
.case-body { padding: 20px 0 0; }
.case-meta { display: flex; justify-content: space-between; align-items: center; font-size: 11.5px; font-weight: 500; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; }
.case-meta .cat { color: var(--accent); }
.case-brand { font-family: var(--serif); font-weight: 900; font-size: var(--fs-h3); margin-top: 10px; letter-spacing: -.01em; }
.case-result { margin-top: 8px; font-size: 13.5px; font-weight: 300; color: var(--ink-2); }

/* ---------- 客户墙（规整六列等宽网格，字号统一）---------- */
.clients-flow {
  display: grid; grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.client-item {
  display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 66px; padding: 12px 10px;
  font-size: clamp(13px, 1.2vw, 15px); color: var(--ink-2); font-weight: 400;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  transition: color .3s var(--ease), background .3s var(--ease);
  letter-spacing: .02em;
}
.client-item:hover { color: var(--bg); background: var(--ink); }

/* ---------- 客户口碑 ---------- */
.voices { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 44px); }
.voice { border-top: 1px solid var(--ink); padding-top: 24px; display: flex; flex-direction: column; gap: 22px; }
.voice q { font-family: var(--serif); font-weight: 600; font-size: var(--fs-h3); line-height: 1.85; color: var(--ink); quotes: "「" "」"; letter-spacing: -.008em; }
.voice-from { margin-top: auto; font-size: 13px; color: var(--ink-2); letter-spacing: .04em; }
.voice-from b { color: var(--ink); font-weight: 500; display: block; }
.voice-from span { color: var(--ink-3); font-size: 11.5px; letter-spacing: .16em; text-transform: uppercase; }

/* ---------- 研习社 ---------- */
.post-list { border-top: 1px solid var(--ink); }
.post-item { display: grid; grid-template-columns: 120px 1fr auto; gap: clamp(16px, 3vw, 44px); align-items: baseline; padding: clamp(20px, 2.8vw, 30px) 0; border-bottom: 1px solid var(--line); transition: padding-left .4s var(--ease); }
.post-item:hover { padding-left: 12px; }
.post-date { font-size: 12.5px; color: var(--ink-3); letter-spacing: .1em; font-variant-numeric: tabular-nums; }
.post-title { font-family: var(--serif); font-weight: 600; font-size: var(--fs-h3); color: var(--ink); transition: color .3s var(--ease); letter-spacing: -.008em; }
.post-item:hover .post-title { color: var(--accent); }
.post-tag { font-size: 11px; font-weight: 500; letter-spacing: .14em; color: var(--accent); border: 1px solid rgba(224, 27, 36, .35); border-radius: var(--radius-pill); padding: 4px 12px; white-space: nowrap; text-transform: uppercase; }

/* ---------- CTA（深色 + 暗角）---------- */
.cta { background: var(--dark); color: var(--on-dark); position: relative; overflow: hidden; }
.cta::before {
  content: ""; position: absolute; right: -14%; top: -34%; width: 52%; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(224, 27, 36, .30) 0%, transparent 62%);
  pointer-events: none;
}
.cta::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 86% 72% at 34% 50%, transparent 40%, rgba(0, 0, 0, .6) 100%);
}
/* 注意：与 .wrap 同元素的块级容器只能用 padding-block，
   用 padding 简写会把 .wrap 的左右内边距清零，导致内容贴边 */
.cta-in { padding-block: clamp(76px, 10vw, 140px); position: relative; z-index: 6; }
.cta h2 { color: var(--on-dark); font-size: clamp(30px, 4.6vw, 62px); max-width: 17em; }
.cta h2 em { color: var(--accent); font-style: normal; }
.cta p { margin-top: 22px; color: var(--on-dark-2); max-width: 460px; font-weight: 300; }
.cta .btn { margin-top: 46px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--dark); color: var(--on-dark-2); border-top: 1px solid var(--line-dark); }
.footer-in { padding-block: clamp(52px, 7vw, 88px) 38px; }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: clamp(28px, 5vw, 76px); }
.footer-logo { height: 24px; filter: brightness(0) invert(.94); opacity: .9; }
.footer-slogan { margin-top: 20px; font-family: var(--serif); font-weight: 600; font-size: 16.5px; color: var(--on-dark); line-height: 1.9; letter-spacing: -.008em; }
.footer-h { font-size: 11px; font-weight: 500; letter-spacing: .26em; color: rgba(242, 242, 240, .38); text-transform: uppercase; margin-bottom: 18px; }
.footer-links a { display: block; padding: 6px 0; font-size: 14px; font-weight: 300; transition: color .3s var(--ease), padding-left .3s var(--ease); }
.footer-links a:hover { color: var(--on-dark); padding-left: 7px; }
.footer-contact p { font-size: 14px; font-weight: 300; padding: 6px 0; }
.footer-bottom { margin-top: clamp(36px, 5vw, 62px); padding-top: 22px; border-top: 1px solid var(--line-dark); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; letter-spacing: .08em; color: rgba(242, 242, 240, .34); }

/* ============================================================
   板块级样式系统（每个板块的 style 配置 → CSS 变量）
   空值 = 跟随全站设计令牌，因此不配置时外观与全站完全一致。
   背景色 / 背景图 / 遮罩 / 文字色 / 标题字体 / 标题字号 / 正文字号 / 上下留白 / 对齐
   ============================================================ */
.section { --sec-pad-t: var(--sec); --sec-pad-b: var(--sec); }
.section.tight { --sec-pad-t: calc(var(--sec) * .62); --sec-pad-b: calc(var(--sec) * .62); }
.hero { --sec-pad-t: clamp(116px, 14vh, 156px); --sec-pad-b: clamp(52px, 6vw, 88px); }
.page-hero { --sec-pad-t: clamp(126px, 15vh, 176px); --sec-pad-b: clamp(38px, 5.5vw, 68px); }
.cta-in { --sec-pad-t: clamp(76px, 10vw, 140px); --sec-pad-b: clamp(76px, 10vw, 140px); }

.section, .hero, .page-hero {
  padding-block: var(--sec-pad, var(--sec-pad-t)) var(--sec-pad, var(--sec-pad-b));
}
.cta-in { padding-block: var(--sec-pad, var(--sec-pad-t)) var(--sec-pad, var(--sec-pad-b)); }

/* 版式：字体 / 字号 可被板块覆盖。
   注意——颜色只在板块**显式设置了**文字色时才覆盖，否则会盖掉组件自身的配色
   （曾导致深色 CTA 区的标题被染成深灰而看不见）。 */
[data-sec] h1, [data-sec] h2, [data-sec] h3, [data-sec] .sec-title {
  font-family: var(--sec-serif, var(--serif));
}
[data-sec][style*="--sec-ink"] h1,
[data-sec][style*="--sec-ink"] h2,
[data-sec][style*="--sec-ink"] h3,
[data-sec][style*="--sec-ink"] .sec-title,
[data-sec][style*="--sec-ink"] p,
[data-sec][style*="--sec-ink"] li,
[data-sec][style*="--sec-ink"] dd { color: var(--sec-ink); }

[data-sec] .sec-title { font-size: var(--sec-fs-title, var(--fs-h2)); }
[data-sec] .hero h1 { font-size: var(--sec-fs-title, var(--fs-h1)); }
[data-sec] .sec-lead, [data-sec] p, [data-sec] li, [data-sec] dd {
  font-size: var(--sec-fs-body, inherit);
}
[data-sec] { text-align: var(--sec-align, inherit); }

/* 深色背景：文字自动转浅色（按背景亮度自动判定，不是写死的深色模块） */
[data-dark] h1, [data-dark] h2, [data-dark] h3, [data-dark] .sec-title { color: #fff; }
[data-dark] p, [data-dark] .sec-lead, [data-dark] li, [data-dark] dd,
[data-dark] .value-desc, [data-dark] .stat-label { color: rgba(255, 255, 255, .8); }
[data-dark] .label, [data-dark] .kicker { color: rgba(255, 255, 255, .52); }
[data-dark] .stat-num, [data-dark] .value-title, [data-dark] .client-item { color: #fff; }
[data-dark] .client-item, [data-dark] .clients-flow, [data-dark] .values,
[data-dark] .value-row, [data-dark] .svc-row, [data-dark] .svc-item,
[data-dark] .post-item, [data-dark] .secret-row { border-color: rgba(255, 255, 255, .14); }
[data-dark] .client-item:hover { background: #fff; color: var(--ink); }
[data-dark] .hex-node-in { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .18); }
[data-dark] .hex-node-in b { color: #fff; }
[data-dark] .hex-node-in p { color: rgba(255, 255, 255, .62); }
[data-dark] .form-field input, [data-dark] .form-field textarea { background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .24); color: #fff; }
[data-dark] .form-field label, [data-dark] .contact-row dt { color: rgba(255, 255, 255, .52); }
[data-dark] .contact-row dd { color: #fff; }
[data-dark] .contact-list { border-color: rgba(255, 255, 255, .3); }
[data-dark] .contact-row { border-color: rgba(255, 255, 255, .14); }

/* ---------- 动效：滚动浮现（translate 属性，不碰 transform）---------- */
.reveal { opacity: 0; translate: 0 20px; transition: opacity var(--dur-slow) var(--ease), translate var(--dur-slow) var(--ease); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; translate: 0 0; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; translate: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 内页通用 ---------- */
.page-hero { padding: clamp(126px, 15vh, 176px) 0 clamp(38px, 5.5vw, 68px); border-bottom: 1px solid var(--line-strong); }
.page-hero h1 { font-size: clamp(26px, 3.4vw, 48px); line-height: 1.34; max-width: 24em; margin-top: 22px; }
.page-hero .sec-lead { font-size: 17px; }
.breadcrumb { font-size: 11.5px; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; }
.breadcrumb a:hover { color: var(--accent); }

.richtext { max-width: 720px; font-size: 16.5px; font-weight: 300; line-height: 2.05; color: var(--ink-2); }
/* 富文本内容恢复语义样式（基础 reset 之后需显式声明） */
.richtext ul, .richtext ol { padding-left: 24px; margin: 14px 0; }
.richtext ul { list-style: disc; }
.richtext ol { list-style: decimal; }
.richtext li { margin: 6px 0; }
.richtext figure { margin: 24px 0; }
.richtext h2 { font-size: 26px; margin: 42px 0 16px; }
.richtext h3 { font-size: 21px; margin: 32px 0 12px; }
.richtext p { margin: 20px 0; }
.richtext img { margin: 28px 0; border-radius: var(--radius-img); }
.richtext blockquote { margin: 30px 0; padding-left: 24px; border-left: 2px solid var(--accent); font-family: var(--serif); font-weight: 600; font-size: 18px; color: var(--ink); line-height: 1.9; }
.richtext table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.richtext th, .richtext td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.richtext th { background: var(--surface); color: var(--ink); font-weight: 500; }

/* 服务详情 */
.svc-detail { border-top: 1px solid var(--line-strong); }
.svc-block { display: grid; grid-template-columns: 300px 1fr; gap: clamp(24px, 5vw, 72px); padding: clamp(34px, 4.5vw, 60px) 0; border-bottom: 1px solid var(--line); }
.svc-block-side .no { font-size: 11.5px; letter-spacing: .2em; color: var(--ink-3); text-transform: uppercase; }
.svc-block-side h3 { font-family: var(--serif); font-weight: 900; font-size: clamp(24px, 3vw, 38px); margin-top: 12px; letter-spacing: -.02em; }
.svc-block-side .essence { margin-top: 10px; font-size: 12px; letter-spacing: .2em; color: var(--accent); text-transform: uppercase; }
.svc-block-main > p { font-size: 16px; font-weight: 300; color: var(--ink-2); }
.svc-scope { margin: 20px 0 0; padding: 0; }
.svc-scope li { list-style: none; font-size: 14.5px; font-weight: 300; color: var(--ink-2); padding: 9px 0; border-bottom: 1px solid var(--line); }
.svc-scope li::before { content: "—"; color: var(--accent); margin-right: 12px; }
.svc-period-line { margin-top: 18px; font-size: 12.5px; letter-spacing: .1em; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* 自由块：文字块 / 图片块 */
.text-block { max-width: 820px; }
.text-block p { font-size: 17px; font-weight: 300; line-height: 2.05; color: var(--ink-2); margin: 18px 0; }
.section.dark .text-block p { color: var(--on-dark-2); }
.img-block { margin: 0; }
.img-block img { width: 100%; border-radius: var(--radius-img); }

.img-block figcaption { margin-top: 12px; font-size: 12px; letter-spacing: .14em; color: var(--ink-3); text-transform: uppercase; }
.img-placeholder { border: 1px dashed var(--line-strong); border-radius: var(--radius-img); padding: 60px 20px; text-align: center; color: var(--ink-3); font-size: 13px; }

/* 服务详情：服务目标 / 服务模块 / 交付成果 / 总结 */
.svc-goal { font-size: 16px; font-weight: 300; color: var(--ink-2); }
.svc-scope-wrap, .svc-dels-wrap { margin-top: 26px; }
.svc-scope-wrap h4, .svc-dels-wrap h4 {
  font-family: var(--sans); font-size: 11px; font-weight: 500; letter-spacing: .24em;
  color: var(--ink-3); text-transform: uppercase; margin: 0 0 12px;
}
.svc-dels { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.svc-dels li { font-size: 13px; font-weight: 300; color: var(--ink-2); border: 1px solid var(--line-strong); border-radius: var(--radius-pill); padding: 6px 14px; }
.svc-summary {
  margin-top: 26px; padding-left: 20px; border-left: 2px solid var(--accent);
  font-family: var(--serif); font-weight: 600; font-size: 15.5px; color: var(--ink); line-height: 1.9;
}
.svc-note { margin-top: 14px; font-size: 11.5px; color: var(--accent); letter-spacing: .06em; }

/* 服务理念 */
.philosophy-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 4vw, 56px); }
.philosophy-cols p { font-size: 15.5px; font-weight: 300; line-height: 2.05; color: var(--on-dark-2); }
.section.dark .philosophy-cols p:first-child { color: var(--on-dark); font-size: 17px; }

/* 服务计划 */
.plans-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(18px, 2.6vw, 30px); }
.plan-card { border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); padding: clamp(26px, 3.4vw, 44px); display: flex; flex-direction: column; }
.plan-card.is-feature { background: var(--dark); border-color: var(--dark); color: var(--on-dark-2); }
.plan-card.is-feature .plan-name, .plan-card.is-feature .plan-tagline { color: var(--on-dark); }
.plan-card.is-feature .plan-target, .plan-card.is-feature .plan-goals li { color: var(--on-dark-2); }
.plan-card.is-feature .plan-head, .plan-card.is-feature .plan-goals li, .plan-card.is-feature .plan-foot { border-color: var(--line-dark); }
.plan-card.is-feature .plan-price b { color: var(--on-dark); }
.plan-card.is-feature .plan-foot { color: rgba(242, 242, 240, .42); }
.plan-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.plan-name { font-family: var(--serif); font-weight: 900; font-size: clamp(24px, 2.8vw, 34px); letter-spacing: -.02em; }
.plan-sub { font-size: 11.5px; letter-spacing: .22em; color: var(--accent); text-transform: uppercase; margin-top: 6px; }
.plan-price { text-align: right; }
.plan-price b { display: block; font-family: var(--serif); font-weight: 900; font-size: clamp(20px, 2.2vw, 27px); color: var(--ink); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.plan-price span { font-size: 12px; letter-spacing: .1em; color: var(--ink-3); }
.plan-tagline { margin-top: 20px; font-family: var(--serif); font-weight: 600; font-size: var(--fs-body); color: var(--ink); }
.plan-target { margin-top: 12px; font-size: 14.5px; font-weight: 300; line-height: 1.9; }
.plan-goals { list-style: none; margin: 20px 0 0; padding: 0; }
.plan-goals li { font-size: 14px; font-weight: 300; padding: 10px 0; border-bottom: 1px solid var(--line); }
.plan-goals li::before { content: "—"; color: var(--accent); margin-right: 10px; }
.plan-foot { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--ink-3); letter-spacing: .06em; }
.plan-foot b { color: var(--accent); font-weight: 600; }

/* 合作流程 */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(28px, 3.4vw, 52px); }
.step { padding-top: 22px; border-top: 2px solid var(--ink); }
.step-key { font-family: var(--serif); font-weight: 900; font-size: 26px; color: var(--accent); letter-spacing: .06em; }
.step-title { font-family: var(--serif); font-weight: 600; font-size: var(--fs-h3); margin-top: 12px; }
.step-desc { margin-top: 6px; font-size: 11px; letter-spacing: .12em; color: var(--ink-3); text-transform: uppercase; }
.step-items { list-style: none; margin: 18px 0 0; padding: 0; }
.step-items li { font-size: 13.5px; font-weight: 300; color: var(--ink-2); padding: 8px 0; border-bottom: 1px solid var(--line); line-height: 1.7; }
.step-items li:last-child { border-bottom: 0; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 5vw, 80px); align-items: start; }
.contact-list { border-top: 1px solid var(--ink); }
.contact-row { display: grid; grid-template-columns: 106px 1fr; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.contact-row dt { font-size: 11.5px; letter-spacing: .2em; color: var(--ink-3); text-transform: uppercase; }
.contact-row dd { margin: 0; font-size: 15.5px; color: var(--ink); font-weight: 300; }
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-size: 11.5px; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; margin-bottom: 8px; }
.form-field input, .form-field textarea {
  width: 100%; padding: 13px 15px; font-size: 15px; font-family: var(--sans); font-weight: 300;
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--line-strong); border-radius: var(--radius-img); outline: none;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.form-field input::placeholder, .form-field textarea::placeholder { color: #9A9A96; }
.form-field input:focus, .form-field textarea:focus { border-color: var(--ink); background: #fff; }
.form-field textarea { min-height: 130px; resize: vertical; line-height: 1.8; }
.form-ok { margin-top: 14px; font-size: 14px; color: var(--accent); }

/* 关于页 */
.about-essay { max-width: 780px; }
.about-essay p { margin: 18px 0; font-size: 17px; font-weight: 300; line-height: 2.1; color: var(--ink-2); }
.about-essay p:first-of-type::first-letter { font-family: var(--serif); font-weight: 900; font-size: 3.2em; float: left; line-height: .86; margin: 6px 12px 0 0; color: var(--ink); }
.secret-list { border-top: 1px solid var(--ink); }
.secret-row { display: grid; grid-template-columns: 66px 1fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.secret-no { font-family: var(--serif); font-weight: 900; font-size: 20px; color: var(--accent); }
.secret-text { font-family: var(--serif); font-weight: 600; font-size: var(--fs-h3); color: var(--ink); letter-spacing: -.012em; }

/* ---------- 响应式：≤1080 / ≤860 / ≤640 ---------- */
@media (max-width: 1080px) {
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .clients-flow { grid-template-columns: repeat(4, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .philosophy-cols { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 980px) {
  .method-stage { grid-template-columns: 1fr; gap: 22px; }
  .method-slogan, .method-slogan.left { text-align: center; }
  .method-slogan.left::after { margin: 12px auto 0; }
  .method-slogan.right::before { margin: 0 auto 12px; }
  .method-ring { width: 100%; aspect-ratio: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .method-ring::before, .method-ring::after { display: none; }
  .ring-core { position: relative; left: auto; top: auto; transform: none; grid-column: 1 / -1; width: auto; max-width: 100%; box-sizing: border-box; aspect-ratio: auto; border-radius: 999px; padding: 14px 20px; font-size: 16px; box-shadow: 0 0 0 4px var(--bg), 0 0 0 5px var(--line-strong); }
  .ring-core::after { border-radius: 999px; inset: 4px; opacity: .5; }
  .hex-node { position: static; width: auto; max-width: 100%; transform: none !important; }
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 74px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(245, 245, 243, .97); backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line); padding: 10px var(--gutter) 22px;
    transform: translateY(-10px); opacity: 0; pointer-events: none; transition: .4s var(--ease);
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav-cta { text-align: center; margin-top: 14px; }
  .nav-burger { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero-figure img { aspect-ratio: 16 / 10; }
  .stats-in { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat { border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: 0; }
  .value-row { grid-template-columns: 54px 1fr; }
  .value-desc { grid-column: 2; }
  .svc-row { grid-template-columns: 54px 1fr; }
  .svc-desc { grid-column: 2; }
  .svc-period { display: none; }
  .svc-block { grid-template-columns: 1fr; gap: 20px; }
  .contact-grid { grid-template-columns: 1fr; }
  .voices { grid-template-columns: 1fr; }
  .post-item { grid-template-columns: 1fr; gap: 8px; }
  .post-tag { justify-self: start; }
  .plans-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .plan-head { flex-direction: column; gap: 12px; }
  .plan-price { text-align: left; }
}
@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .case-grid { grid-template-columns: 1fr; }
  .clients-flow { grid-template-columns: repeat(3, 1fr); }
  .client-item { min-height: 56px; padding: 10px 6px; font-size: 12.5px; }
  .footer-top { grid-template-columns: 1fr; }
  .hero { padding-top: 116px; }
  .hero-actions { width: 100%; }
  .btn { width: 100%; justify-content: center; }
  .hero-rule { flex-direction: column; gap: 10px; }
}