/* 奇点 AI · 站点样式 v0.1 */
:root {
  --ink: #0e1116;
  --ink-2: #3d4552;
  --ink-3: #6b7484;
  --line: #e4e7ec;
  --bg: #ffffff;
  --bg-2: #f7f8fa;
  --brand: #1a56db;
  --brand-ink: #123c9c;
  --accent: #0b8a6a;
  --warn: #b4530a;
  --radius: 14px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}

img { max-width: 100%; display: block; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- 可访问性 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
}
.logo {
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 7px;
}
.logo:hover { text-decoration: none; }
.logo .en {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.nav a {
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
}
.nav .btn { color: #fff; }

@media (max-width: 860px) {
  .nav a:not(.btn) { display: none; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid var(--brand);
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
  line-height: 1.4;
}
.btn:hover { background: var(--brand-ink); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 15px 30px; font-size: 16.5px; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--bg-2); color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 84px 0 64px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 380px at 82% -12%, #eaf0fe 0%, rgba(255,255,255,0) 62%),
    var(--bg);
}
/* 首屏配图：装饰性背景，压低透明度保证正文对比度 */
.hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 62%;
  height: 100%;
  background: url("art/hero-light.jpg") no-repeat right center;
  background-size: contain;
  opacity: 0.34;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 34%);
  mask-image: linear-gradient(to right, transparent 0%, #000 34%);
}
.hero .wrap { position: relative; z-index: 1; }
@media (max-width: 900px) {
  /* 窄屏文字占满宽度，配图会压到字上，直接隐藏 */
  .hero::after { display: none; }
}
@media (prefers-reduced-motion: no-preference) {
  .hero::after { transition: opacity 0.3s ease; }
}
.eyebrow {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-ink);
  background: #eaf0fe;
  border: 1px solid #d3e0fb;
  padding: 5px 13px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(30px, 5.1vw, 50px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  max-width: 19em;
  font-weight: 700;
}
.hero h1 .hl {
  background: linear-gradient(transparent 62%, #ffe08a 62%);
  padding: 0 2px;
}
.hero .lede {
  font-size: 18.5px;
  color: var(--ink-2);
  max-width: 34em;
  margin: 0 0 34px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-note { font-size: 14px; color: var(--ink-3); margin-top: 18px; }

/* ---------- 数字墙 ---------- */
.stats {
  padding: 0;
  margin: 54px 0 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stats li { background: #fff; padding: 22px 20px; }
.stats .k {
  font-size: 13px;
  color: var(--ink-3);
  font-weight: 600;
  margin-bottom: 8px;
}
.stats .v {
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.45;
}
.stats .v s {
  color: var(--ink-3);
  font-weight: 500;
  text-decoration-thickness: 1.5px;
}
.stats .v em {
  font-style: normal;
  color: var(--accent);
}
@media (max-width: 780px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 区块 ---------- */
section { padding: 76px 0; }
section.alt { background: #f0f2f6; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.sec-head { max-width: 42em; margin-bottom: 42px; }
.sec-head h2 {
  font-size: clamp(24px, 3.4vw, 33px);
  line-height: 1.32;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
  font-weight: 700;
}
.sec-head p { font-size: 17px; color: var(--ink-2); margin: 0; }

/* ---------- 痛点自查 ---------- */
.checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
}
.checks li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 20px 52px;
  position: relative;
  font-size: 16px;
  color: var(--ink-2);
}
.checks li::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 24px;
  width: 17px;
  height: 17px;
  border: 2px solid var(--brand);
  border-radius: 4px;
}
.checks li strong { color: var(--ink); font-weight: 600; }
.checks-foot {
  margin: 28px 0 0;
  font-size: 16.5px;
  color: var(--ink-2);
}

/* ---------- 两种合作方式 ---------- */
.plans {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 22px;
  align-items: start;
}
@media (max-width: 880px) { .plans { grid-template-columns: 1fr; } }

.plan {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
}
.plan.featured {
  border: 2px solid var(--brand);
  box-shadow: 0 8px 28px rgba(26, 86, 219, 0.09);
}
.plan-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-3);
  background: var(--bg-2);
  border: 1px solid var(--line);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.plan-tag.hot {
  color: #fff;
  background: var(--brand);
  border-color: var(--brand);
}
.plan h3 {
  margin: 0 0 12px;
  font-size: 21px;
  letter-spacing: -0.015em;
  line-height: 1.4;
}
.plan-price {
  margin: 0 0 12px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.plan-price span {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-3);
  margin-left: 8px;
  letter-spacing: 0;
}
.plan-sub {
  margin: 0 0 20px;
  font-size: 16px;
  color: var(--ink-2);
}
.plan-list {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  display: grid;
  gap: 11px;
}
.plan-list li {
  position: relative;
  padding-left: 26px;
  font-size: 15.5px;
  color: var(--ink-2);
}
.plan-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 700;
}
.plan-note {
  background: #fffbeb;
  border: 1px solid #f2e0ab;
  border-radius: 10px;
  padding: 16px 18px;
  font-size: 15px;
  color: var(--ink-2);
  margin: 0 0 22px;
  line-height: 1.72;
}
.plan-note strong { color: var(--ink); display: block; margin-bottom: 6px; }
.plan .btn { align-self: flex-start; margin-top: auto; }

.plan-req {
  margin-top: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--ink-3);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 26px;
}
.plan-req h3 { margin: 0 0 10px; font-size: 17.5px; }
.plan-req p { margin: 0; font-size: 15.5px; color: var(--ink-2); }

/* ---------- 案例 ---------- */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 22px;
}
.case {
  background: #fff;
  border: 1px solid #d0d5dd;
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.case-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.case h3 { font-size: 20px; margin: 0; letter-spacing: -0.01em; font-weight: 800; color: var(--ink); }
.tag {
  font-size: 12.5px;
  font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid;
}
.tag-done { color: var(--accent); background: #e8f6f1; border-color: #c3e8dc; }
.tag-wip { color: var(--warn); background: #fdf1e4; border-color: #f5ddc2; }
.case .dept { font-size: 13.5px; color: var(--ink-3); margin: -8px 0 16px; }
.compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  background: #eaf4f0;
  border: 1px solid #c3e8dc;
  border-radius: 10px;
  padding: 16px 14px;
  margin-bottom: 18px;
  text-align: center;
}
.compare .lab { font-size: 12px; color: var(--ink-3); font-weight: 600; display: block; margin-bottom: 4px; }
.compare .before { font-size: 15px; color: #7a2e2e; font-weight: 600; text-decoration: line-through; }
.compare .arrow { color: var(--accent); font-size: 20px; font-weight: 700; }
.compare .after { font-size: 16px; color: var(--accent); font-weight: 800; }
.case p.body { font-size: 15.5px; color: var(--ink-2); margin: 0 0 16px; }
.case .kicker {
  font-size: 15px;
  color: var(--ink);
  background: #fffbeb;
  border-left: 3px solid #f0c040;
  padding: 12px 14px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 18px;
}
.case .meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink-3);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 案例截图 */
.case-shot { margin: 0 0 18px; }
.shot-grid { display: grid; gap: 10px; }
.case-shot a {
  display: block;
  border: 2px solid #d0d5dd;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.case-shot a:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.case-shot img {
  display: block;
  width: 100%;
  height: auto;
}
.case-shot figcaption {
  font-size: 12.5px;
  color: var(--ink-3);
  margin-top: 8px;
}

/* ---------- 为什么是我 ---------- */
.why {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}
.why-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.why-card h3 { margin: 0 0 10px; font-size: 18px; }
.why-card p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.why-quote {
  margin: 36px 0 0;
  padding: 24px 26px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  font-size: 18px;
  line-height: 1.7;
}
.why-quote b { color: #ffe08a; font-weight: 700; }

/* ---------- 流程 ---------- */
.steps { list-style: none; padding: 0; margin: 0; counter-reset: s; display: grid; gap: 16px; }
.steps li {
  counter-increment: s;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px 24px 78px;
  position: relative;
}
.steps li::before {
  content: counter(s);
  position: absolute;
  left: 24px;
  top: 24px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-size: 16px;
}
.steps h3 { margin: 0 0 8px; font-size: 18px; }
.steps p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.steps .out { font-size: 14px; color: var(--ink-3); margin-top: 8px; }

.price-box {
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 26px;
}
.price-box h3 { margin: 0 0 14px; font-size: 18px; }
.price-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  font-size: 16px;
  color: var(--ink-2);
}
.price-row b { color: var(--ink); }
.price-box .fine { font-size: 14px; color: var(--ink-3); margin: 16px 0 0; }

/* ---------- 渠道 ---------- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}
.partner-grid div {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.partner-grid h3 { margin: 0 0 8px; font-size: 17px; }
.partner-grid p { margin: 0; font-size: 15.5px; color: var(--ink-2); }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 34px;
  align-items: start;
}
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }

form .field { margin-bottom: 18px; }
form label { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 7px; }
form .req { color: #c02626; }
form input, form textarea, form select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cfd4dc;
  border-radius: 10px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
}
form textarea { min-height: 108px; resize: vertical; }
form .hint { font-size: 13.5px; color: var(--ink-3); margin-top: 6px; }
.qr-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  text-align: center;
}
.qr-img {
  width: 100%;
  max-width: 260px;
  height: auto;
  margin: 0 auto 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.qr-card p { margin: 0; font-size: 15px; color: var(--ink-2); }
.qr-card .qr-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}
.qr-card p + p { margin-top: 4px; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
  font-size: 14.5px;
  color: var(--ink-3);
  background: var(--bg-2);
}
.site-footer .cols {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 40px;
  justify-content: space-between;
  align-items: flex-start;
}
.site-footer strong { color: var(--ink); font-size: 15.5px; }
.site-footer p { margin: 6px 0 0; }

/* ---------- 品牌释义带 ---------- */
.brandband {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
  padding: 56px 0;
}
/* 奇点释义配图：深色底同色系，作为装饰层 */
.brandband::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("art/brand-singularity.jpg") no-repeat center right;
  background-size: cover;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to right, transparent 8%, #000 62%);
  mask-image: linear-gradient(to right, transparent 8%, #000 62%);
}
.brandband .wrap { position: relative; z-index: 1; }
@media (max-width: 900px) {
  .brandband::after { opacity: 0.28; }
}
.brandband .bb-lead {
  margin: 0 0 14px;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brandband .bb-body {
  margin: 0;
  max-width: 760px;
  font-size: 17px;
  color: #c8cedb;
}
.brandband .bb-body strong { color: #fff; }
.brandband .bb-slogan {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 18px;
  font-weight: 700;
  color: #9ab8ff;
  letter-spacing: 0.04em;
}
@media (max-width: 640px) {
  .brandband { padding: 40px 0; }
  .brandband .bb-lead { font-size: 22px; }
}

/* ---------- 团队 ---------- */
.team {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.member {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  background: #fff;
}
.member.lead {
  grid-column: 1 / -1;
  border-color: #c3d3f7;
  background: linear-gradient(180deg, #f5f8ff 0%, #ffffff 60%);
}
.member .m-top {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.member h3 { margin: 0; font-size: 20px; }
.member .m-role {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-ink);
}
.member .m-cred {
  margin: 8px 0 0;
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.6;
}
.member .m-body {
  margin: 12px 0 0;
  font-size: 15.5px;
  color: var(--ink-2);
}
.member .m-focus {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  color: var(--ink-2);
}
.member .m-focus b {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--bg-2);
  font-size: 13px;
  color: var(--ink-3);
}
.team-foot {
  margin: 22px 0 0;
  font-size: 15.5px;
  color: var(--ink-2);
}
@media (max-width: 820px) { .team { grid-template-columns: 1fr; } }

/* ---------- 客户名单 ---------- */
.clients {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.clients li {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 14.5px;
  color: var(--ink-2);
}
.clients-foot {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--ink-3);
}

/* ---------- 页脚补充 ---------- */
.site-footer .f-sub { color: var(--ink-3); }

/* ---------- 我们自己在用的 ---------- */
.apps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.app {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  display: flex;
  flex-direction: column;
}
.app a {
  display: block;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
}
.app img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  object-position: top center;
}
.app figcaption {
  padding: 16px 18px;
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.65;
}
.app figcaption b {
  display: block;
  color: var(--ink);
  font-size: 15.5px;
  margin-bottom: 4px;
}
.apps-kicker {
  margin: 24px 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--brand);
  background: var(--bg-2);
  border-radius: 0 12px 12px 0;
  font-size: 16.5px;
  color: var(--ink-2);
}
.apps-kicker strong, .apps-kicker b { color: var(--ink); }
.apps-try {
  margin: 16px 0 0;
  font-size: 14.5px;
  color: var(--ink-3);
}
@media (max-width: 900px) { .apps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) {
  .apps { grid-template-columns: 1fr; }
  .app img { height: 340px; }
}

/* ---------- FAQ ---------- */
.faq {
  display: grid;
  gap: 12px;
  margin-top: 8px;
}
.faq details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  overflow: hidden;
}
.faq details[open] {
  border-color: #cfd8ea;
  box-shadow: 0 1px 3px rgba(14, 17, 22, 0.05);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 52px 18px 20px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  line-height: 1.5;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--brand);
  line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq summary:hover { background: var(--bg-2); }
.faq summary:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: -3px;
}
.faq-a {
  padding: 0 20px 18px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.faq-a p {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
}
.faq-a p:last-child { margin-bottom: 0; }
.faq-a strong { color: var(--ink); }
.faq-foot {
  margin: 22px 0 0;
  font-size: 15px;
  color: var(--ink-3);
}

/* 表单提交状态 */
.form-status-ok { color: var(--accent); font-weight: 600; }
.form-status-err { color: var(--warn); font-weight: 600; }

/* ---------- 锚点跳转偏移 ---------- */
/* 顶栏是 sticky（min-height 64px），锚点跳转必须留出让位，
   否则区块标题会钻到顶栏底下被盖住。 */
:target { scroll-margin-top: 84px; }
section[id], main > div[id], a[id] { scroll-margin-top: 84px; }

/* 标题避免尾字单独成行（孤字），窄屏下更整齐 */
.sec-head h2 { text-wrap: pretty; }

/* ---------- 中文标题断行优化 ---------- */
/* 中文没有词边界，浏览器会在任意两字之间断行，导致「日常」被劈开、
   尾字孤零零掉一行。balance 让多行标题各行长度均匀，
   .nb 用来锁住不该拆开的短语（数字+量词、专有名词）。 */
h1, h2, h3 { text-wrap: balance; }
.hero h1 { text-wrap: pretty; }          /* 长标题 balance 会失效，pretty 只防孤字 */
.nb { white-space: nowrap; }             /* no-break：整块不断行 */

/* 标题里带高亮底色的短语，断行时底色会断成两截，尽量整体保留 */
.hero h1 .hl { box-decoration-break: clone; -webkit-box-decoration-break: clone; }

/* 窄屏兜底：以前是把 .nb 的 nowrap 解掉，结果短语又被劈开，等于没修。
   改成缩字号——短语锁死不动，靠更小的字让它塞进容器。 */
@media (max-width: 400px) {
  .hero h1 { font-size: 27px; }
}

/* 真正极窄（<340px，基本只剩老设备）才允许断行，防横向溢出 */
@media (max-width: 340px) {
  h1 .nb, h2 .nb, h3 .nb { white-space: normal; }
}