/* =====================================================================
   three-sections.css — ICC 官网新版三板块（about / work / services）
   设计语言：编辑风（manifesto）/ 黑白红主色 / 大字号编号 / 节奏感段落
   依赖 styles.css 的 :root 变量（--red / --ink / --soft / --line / --muted / --gutter / --header-height）
   ===================================================================== */

/* 暗底上的亮红 token（--red #c82b20 在黑底上对比度不足，暗段统一用 --red-bright） */
:root { --red-bright: #ef655b; }

/* ---------------- 通用：编辑风区块 ---------------- */
.manifesto {
  padding: 120px 0 120px;
  background: #fff;
  color: var(--ink);
  border-top: 1px solid var(--line);
}
.manifesto--dark {
  background: var(--ink);
  color: #fff;
  border-top-color: transparent;
}
.manifesto--dark .section-kicker > span:first-child { color: var(--red-bright); }
.manifesto--dark .section-kicker > span + span { color: rgba(255, 255, 255, .55); }
.manifesto--dark .section-kicker > span + span::before { background: rgba(255, 255, 255, .25); }
.manifesto--dark .accent { color: var(--red-bright); }
.manifesto--dark .manifesto-quote,
.manifesto--dark .manifesto-title,
.manifesto--dark .mission-list p,
.manifesto--dark .principles-grid article p,
.manifesto--dark .diff-item p,
.manifesto--dark .flywheel-chain li,
.manifesto--dark .value-item p,
.manifesto--dark .process-list p,
.manifesto--dark .offering article p,
.manifesto--dark .offering .offering-tag,
.manifesto--dark .audience-head p { color: rgba(255, 255, 255, .78); }
.manifesto--dark .principles-grid,
.manifesto--dark .diff-list,
.manifesto--dark .flywheel-chain,
.manifesto--dark .value-grid,
.manifesto--dark .process-list,
.manifesto--dark .offering-grid { border-color: rgba(255, 255, 255, .12); }

/* about 暗段分割线统一 #888（02 使命 / 04 区别） */
.manifesto--dark .mission-list li,
.manifesto--dark .diff-item { border-color: #555555; }

.manifesto-title {
  font-size: clamp(30px, 3.6vw, 50px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 56px;
  /*max-width: 18ch;*/
}
.manifesto-quote {
  font-size: clamp(20px, 1.9vw, 26px);
  line-height: 1.65;
  margin: 0;
  color: #333;
  max-width: 38ch;
}
.manifesto-intro {
  border-left: 2px solid var(--red);
  padding-left: 28px;
}
.manifesto--dark .manifesto-intro { border-left-color: var(--red-bright); }

.manifesto-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 32px);
  align-items: start;
}
.manifesto-body p {
  font-size: 15px;
  line-height: 1.95;
  margin: 0 0 18px;
  color: #444;
}
.manifesto-body p:last-child { margin-bottom: 0; }

/* ---------------- 01 身份：左右两栏 ---------------- */
.identity-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.1fr);
  gap: clamp(36px, 5vw, 88px);
  align-items: start;
}

/* ---------------- 02 使命：三行编号列表 ---------------- */
.mission-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.mission-list li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 28px;
  align-items: baseline;
  padding: 28px 0 32px;
  border-bottom: 1px solid var(--line);
}
.mission-list .num {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}
.manifesto--dark .mission-list .num { color: var(--red-bright); }
.mission-list p {
  font-size: clamp(18px, 1.7vw, 22px);
  line-height: 1.7;
  margin: 0;
  color: var(--ink);
  font-weight: 500;
}

/* ---------------- 03 原则：四宫格 ---------------- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.principles-grid article {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 40px 36px 38px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 16px;
  position: relative;
  background: transparent;
  transition: background .25s ease;
}
.principles-grid article:hover { background: var(--soft); }
.manifesto--dark .principles-grid article:hover { background: rgba(255, 255, 255, .04); }
.principles-grid .principle-num {
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  color: var(--red);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.principles-grid h3 {
  font-size: 21px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0;
}
.principles-grid article p {
  font-size: 14px;
  line-height: 1.85;
  margin: 0;
  color: #555;
}

/* ---------------- 04 区别：四行 × 否定式 ---------------- */
.diff-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.diff-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}
.diff-x {
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 2px solid var(--red);
  color: var(--red);
  font-size: 22px;
  font-weight: 800;
  border-radius: 50%;
  line-height: 1;
  margin-right:60px
}
.manifesto--dark .diff-x { color: var(--red-bright); border-color: var(--red-bright); }
.diff-item h3 {
  font-size: clamp(20px, 1.7vw, 24px);
  font-weight: 700;
  margin: 0;
  white-space: nowrap;
}
.diff-item p {
  font-size: 15px;
  line-height: 1.85;
  margin: 0;
  color: #555;
}

/* ---------------- Work · 01 业务飞轮：垂直链路 ---------------- */
.flywheel {
  padding: 120px 0 120px;
  background: #fff;
  border-top: 1px solid var(--line);
}
.flywheel-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 32px);
  align-items: end;
  margin-bottom: 64px;
}
.flywheel-head p {
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
  color: #555;
}
.flywheel-chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 1px solid var(--line);
}
.flywheel-chain li {
  display: grid;
  grid-template-columns: 80px 28px 1fr;
  gap: 24px;
  align-items: center;
  padding: 26px 0 26px 32px;
  position: relative;
  border-bottom: 1px solid var(--line);
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}
.flywheel-chain li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 50%;
  width: 12px;
  height: 12px;
  background: var(--red);
  border-radius: 50%;
  transform: translateY(-50%);
}
.flywheel-chain li:last-child { border-bottom: 0; }
.flywheel-chain .step {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}
.flywheel-chain .arrow {
  font-size: 18px;
  color: var(--red);
  font-weight: 800;
}

/* ---------------- Work · 02 / 03 价值宫格 ---------------- */
.value {
  padding: 120px 0 120px;
  background: #fff;
  border-top: 1px solid var(--line);
}
.value--dark {
  background: var(--ink);
  color: #fff;
  border-top-color: transparent;
}
.value--dark .section-kicker > span:first-child { color: var(--red-bright); }
.value--dark .section-kicker > span + span { color: rgba(255, 255, 255, .55); }
.value--dark .section-kicker > span + span::before { background: rgba(255, 255, 255, .25); }
.value--dark .accent { color: var(--red-bright); }

.value-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 32px);
  align-items: end;
  margin-bottom: 56px;
}
.value-head p {
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
  color: #555;
}
.value--dark .value-head p { color: rgba(255, 255, 255, .7); }

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.value-item {
  padding: 34px 32px 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
  display: grid;
  gap: 14px;
  transition: background .25s ease;
}
.value-item:hover { background: var(--soft); }
.value--dark .value-item:hover { background: rgba(255, 255, 255, .04); }
.value--dark .value-grid { border-color: rgba(255, 255, 255, .12); }
.value--dark .value-item { border-color: rgba(255, 255, 255, .12); }
.value-item .vnum {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}
.value--dark .value-item .vnum { color: var(--red-bright); }
.value-item h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
}
.value-item p {
  font-size: 14px;
  line-height: 1.85;
  margin: 0;
  color: #a2a2a2;
}

/* ---------------- Work · 04 流程时间线 ---------------- */
.process {
  padding: 120px 0 120px;
  background: #fff;
  border-top: 1px solid var(--line);
}
.process-head {
  margin-bottom: 56px;
  max-width: 760px;
}
.process-head p {
  font-size: 16px;
  line-height: 1.9;
  margin: 28px 0 0;
  color: #555;
}
.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}
.process-list li {
  padding: 32px 26px 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 14px;
  background: transparent;
  transition: background .25s ease;
}
.process-list li:first-child { border-left: 1px solid var(--line); }
.process-list li:hover { background: var(--soft); }
.process-list .pstep {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}
.process-list h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
}
.process-list p {
  font-size: 13px;
  line-height: 1.8;
  margin: 0;
  color: #555;
}

/* ---------------- Services · 三个身份分段 ---------------- */
.audience {
  padding: 120px 0 120px;
  background: #fff;
  border-top: 1px solid var(--line);
}
.audience--B { background: var(--ink); color: #fff; border-top-color: transparent; }
.audience--B .section-kicker > span:first-child { color: var(--red-bright); }
.audience--B .section-kicker > span + span { color: rgba(255, 255, 255, .55); }
.audience--B .section-kicker > span + span::before { background: rgba(255, 255, 255, .25); }
.audience--B .accent { color: var(--red-bright); }
.audience--B .offering article { border-color: #888; }
.audience--B .offering article p,
.audience--B .offering .offering-tag { color: rgba(255, 255, 255, .72); }
.audience--B .offering h3 { color: #fff; }

.audience-head {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
  margin-bottom: 64px;
}
.audience-mark {
  display: grid;
  place-items: center;
  width: 140px;
  height: 140px;
  font-size: 88px;
  font-weight: 800;
  line-height: 1;
  color: var(--red);
  border: 2px solid var(--red);
  border-radius: 50%;
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: -0.04em;
}
.audience--B .audience-mark { color: var(--red-bright); border-color: var(--red-bright); }
.audience-head .section-kicker { margin-bottom: 16px; }
.audience-head h2 {
  font-size: clamp(30px, 3.6vw, 50px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.01em;
  /*max-width: 22ch;*/
}
.audience-head p {
  font-size: 15px;
  line-height: 1.85;
  margin: 20px 0 0;
  color: #555;
}

.offerings {
  display: grid;
  gap: 0;
}
.offering {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(24px, 4vw, 48px);
  padding: 36px 0 40px;
  border-top: 1px solid var(--line);
}
.offering:last-child { border-bottom: 1px solid var(--line); }
.offering .onum {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--red);
  font-variant-numeric: tabular-nums;
  padding-top: 6px;
}
.audience--B .offering .onum { color: var(--red-bright); }
.offering-title h3 {
  font-size: clamp(20px, 1.7vw, 24px);
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
}
.offering-title .offering-tag {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
  letter-spacing: 0.04em;
}
.offering-body ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.offering-body li {
  font-size: 14px;
  line-height: 1.75;
  color: #444;
  position: relative;
  padding-left: 22px;
}
.offering-body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 12px;
  height: 1px;
  background: var(--red);
}
.audience--B .offering-body li { color: rgba(255, 255, 255, .78); }
.audience--B .offering-body li::before { background: var(--red-bright); }

/* ---------------- 收尾标语（与 about.html 末呼应） ---------------- */
.closing-banner {
  padding: 96px 0 100px;
  background: var(--ink);
  color: #fff;
  border-top: 1px solid #222;
  text-align: center;
}
.closing-banner .section-kicker { justify-content: center; }
.closing-banner .section-kicker > span:first-child { color: var(--red-bright); }
.closing-banner .section-kicker > span + span { color: rgba(255, 255, 255, .55); }
.closing-banner .section-kicker > span + span::before { background: rgba(255, 255, 255, .25); }
.closing-banner h2 {
  font-size: clamp(30px, 4vw, 50px);
  font-weight: 800;
  line-height: 1.2;
  margin: 24px auto 0;
  max-width: 22ch;
  letter-spacing: -0.01em;
}
.closing-banner .accent { color: var(--red-bright); }

/* ---------------- about · 创意导师 · 多卡片网格 ---------------- */
.advisors-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.advisor {
  padding: 48px 32px 40px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.advisor-head {
  display: flex;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 28px;
}
.advisor-num {
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  color: var(--red);
  font-family: Georgia, "Times New Roman", serif;
  flex-shrink: 0;
}
.advisor-name {
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.advisor-role {
  font-size: 12px;
  margin: 0;
  color: #888;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.advisor-body {
  font-size: 15px;
  line-height: 1.85;
  color: #333;
}
.advisor-body p { margin: 0 0 12px; }
.advisor-quote {
  margin-top: 18px !important;
  padding-left: 14px;
  border-left: 2px solid var(--red);
  font-size: 14px;
  color: #555;
  font-style: italic;
}

/* =====================================================================
   响应式
   ===================================================================== */
@media (max-width: 1100px) {
  .audience-head { grid-template-columns: 140px minmax(0, 1fr); gap: 28px; }
  .audience-mark { width: 110px; height: 110px; font-size: 64px; }
  .process-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .process-list li:nth-child(3) { border-right: 1px solid var(--line); }
  .process-list li:nth-child(n+4) { border-bottom: 0; }
  .advisors-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .manifesto, .flywheel, .value, .process, .audience, .closing-banner {
    padding: 80px 0 80px;
  }
  .manifesto-title { margin-bottom: 40px; }
  .manifesto-grid,
  .identity-grid,
  .flywheel-head,
  .value-head { grid-template-columns: 1fr; gap: 24px; align-items: start; }
  .principles-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-list li { border-right: 1px solid var(--line); }
  .process-list li:nth-child(2n) { border-right: 0; }
  .process-list li:nth-child(n+3) { border-bottom: 0; }
  .audience-head { grid-template-columns: 1fr; gap: 24px; }
  .audience-mark { width: 96px; height: 96px; font-size: 52px; }
  .offering { grid-template-columns: 1fr; gap: 16px; }
  .offering .onum { padding-top: 0; }
  .flywheel-chain li { grid-template-columns: 56px 16px 1fr; padding-left: 24px; gap: 14px; }
  .diff-item { grid-template-columns: 56px 1fr; gap: 18px; }
  .diff-item p { grid-column: 1 / -1; padding-left: 0; }
}
@media (max-width: 650px) {
  .manifesto, .flywheel, .value, .process, .audience, .closing-banner {
    padding: 64px 0 64px;
  }
  .manifesto-title { font-size: 32px; }
  .manifesto-intro { padding-left: 18px; }
  .mission-list li,
  .flywheel-chain li { grid-template-columns: 1fr; gap: 8px; padding-left: 22px; }
  .mission-list .num,
  .flywheel-chain .step { font-size: 12px; }
  .principles-grid article { padding: 28px 22px; }
  .principles-grid .principle-num { font-size: 48px; }
  .value-grid { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li,
  .process-list li:nth-child(2n) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .process-list li:last-child { border-bottom: 0; }
  .value-item { padding: 26px 22px; }
  .diff-item { padding: 24px 0; }
  .diff-x { width: 44px; height: 44px; font-size: 18px;
  margin-right:20px}
  .audience-mark { width: 84px; height: 84px; font-size: 44px; }
  .closing-banner { padding: 64px 0 64px; }
  .advisors-grid { grid-template-columns: 1fr; }
  .advisor { padding: 36px 22px 32px; }
  .advisor-num { font-size: 48px; }
}
.audience--B .offering{
  border-top: 1px solid #555;
  /*  */
}
.audience--B .offering:last-child{
  border-bottom: 1px solid #555;
}
.manifesto--dark .mission-list{
  border-top: none;
}
.manifesto--dark .diff-list{
  border-top: none;
}
.manifesto--dark .diff-item{
  border-bottom: 1px solid #555;
}

/* ---------------- Work · 04 我们如何运转（黑底） ---------------- */
.process--dark {
  background: var(--ink);
  color: #fff;
  border-top-color: transparent;
}
.process--dark .process-head p { color: rgba(255, 255, 255, .78); }
.process--dark .accent { color: var(--red-bright); }
.process--dark .section-kicker > span:first-child { color: var(--red-bright); }
.process--dark .section-kicker > span + span { color: rgba(255, 255, 255, .55); }
.process--dark .section-kicker > span + span::before { background: rgba(255, 255, 255, .25); }
.process--dark .process-list { border-top: 1px solid #888; }
.process--dark .process-list li { border-right-color: #888; border-bottom-color: #888; }
.process--dark .process-list li:first-child { border-left-color: #888; }
.process--dark .process-list li:hover { background: rgba(255, 255, 255, .05); }
.process--dark .process-list .pstep { color: var(--red-bright); }
.process--dark .process-list h3 { color: #fff; }
.process--dark .process-list p { color: rgba(255, 255, 255, .78); }