/* ==========================================================================
   校聚一城 · 官网样式
   沿用小程序设计令牌：品牌蓝 #1E5FA8 / 深蓝 #123F70 / 浅蓝 #C7DDF3 / 心声玫 #E11D48
   规则：所有色值走变量；卡片只有一种形态；编号只出现在真实流程里。
   ========================================================================== */

:root {
  --ink: #0E2F52;
  --blue-700: #123F70;
  --blue-600: #1E5FA8;
  --blue-500: #2C74BE;
  --blue-300: #5B97D1;
  --blue-200: #93C0E8;
  --blue-100: #C7DDF3;
  --blue-50: #E8F0FA;

  --paper: #FFFFFF;
  --paper-2: #F6F9FD;
  --line: #D9E4F1;
  --line-soft: #E9F0F8;

  --text: #0F1A16;
  --text-2: #44555F;
  --text-3: #6B7A74;

  --pink: #E11D48;
  --pink-50: #FFF0F4;

  --sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Songti SC", "SimSun", "Source Han Serif SC", "Noto Serif CJK SC", serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;

  --shadow-card: 0 1px 0 rgba(18, 63, 112, 0.04), 0 10px 26px -20px rgba(18, 63, 112, 0.55);
  --shadow-phone: 0 26px 60px -28px rgba(11, 40, 70, 0.5), 0 2px 6px rgba(11, 40, 70, 0.08);

  --wrap: 1120px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background-color: var(--paper-2);
  /* 方格纸：作业本那种 28px 浅蓝格，是这站唯一的纹理 */
  background-image:
    linear-gradient(rgba(30, 95, 168, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 95, 168, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 3px solid var(--blue-500);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--blue-700);
  color: #fff;
  border-radius: var(--r-sm);
  transition: top 0.18s var(--ease);
}
.skip:focus { top: 12px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================== 顶栏 ============================== */

.hd {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.88);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.hd-in {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 9px;
  overflow: hidden;
  display: block;
}
.brand-mark img { display: block; width: 100%; height: 100%; }

.brand-txt { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-size: 16px; font-weight: 700; letter-spacing: 0.02em; }
.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--text-3);
  text-transform: uppercase;
}

.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a {
  font-size: 14.5px;
  color: var(--text-2);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.nav a:hover { color: var(--blue-600); }
.nav a[aria-current="page"] { color: var(--blue-700); font-weight: 600; border-bottom-color: var(--blue-600); }

.hd-cta { display: flex; align-items: center; gap: 10px; }

/* ============================== 按钮 ============================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.16s var(--ease), box-shadow 0.16s var(--ease),
    background-color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.btn-primary {
  background: var(--blue-600);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18) inset, 0 8px 18px -12px rgba(30, 95, 168, 0.9);
}
.btn-primary:hover { background: var(--blue-700); transform: translateY(-1px); }

.btn-ghost {
  background: #fff;
  color: var(--blue-700);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--blue-200); background: var(--blue-50); transform: translateY(-1px); }

.btn-sm { padding: 8px 14px; font-size: 13.5px; border-radius: 8px; }
.btn .arw { font-family: var(--mono); }

/* ============================== 首屏 ============================== */

.hero { padding: 78px 0 64px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--blue-700);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: 999px;
  padding: 5px 12px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue-600);
}
.eyebrow .live { color: var(--text-3); font-weight: 500; letter-spacing: 0; }

h1 {
  margin: 20px 0 0;
  text-wrap: balance;
  font-size: clamp(36px, 4.5vw, 60px);
  line-height: 1.14;
  letter-spacing: -0.035em;
  font-weight: 800;
}
h1 em {
  font-style: normal;
  color: var(--blue-600);
}

.nw { white-space: nowrap; }

.lead {
  margin: 22px 0 0;
  max-width: 33em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-2);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.hero-note {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-note::before {
  content: "";
  width: 14px; height: 1px; background: var(--blue-200);
}

/* ------------------------- 手机示意图 ------------------------- */

.stage { position: relative; display: flex; justify-content: center; }

.phone {
  position: relative;
  width: 300px;
  padding: 9px;
  border-radius: 44px;
  background: linear-gradient(168deg, #1B3E63, #0B2440 60%, #0A1F36);
  box-shadow: var(--shadow-phone);
}

.phone::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 36px;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.screen {
  border-radius: 36px;
  overflow: hidden;
  background: #fff;
  aspect-ratio: 300 / 634;
  display: flex;
  flex-direction: column;
  /* 小程序：顶部浅蓝渐变 → 白 */
  background-image: linear-gradient(180deg, #C7DDF3 0, #E4EEF9 22%, #F4F8FC 42%, #ffffff 66%);
}

.sbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 20px 2px;
  font-size: 10.5px;
  font-weight: 600;
  color: #123F70;
  font-family: var(--mono);
}
.sbar .sig { display: flex; gap: 3px; align-items: flex-end; }
.sbar .sig i { width: 2.5px; background: #123F70; border-radius: 1px; }
.sbar .sig i:nth-child(1) { height: 4px; }
.sbar .sig i:nth-child(2) { height: 6px; }
.sbar .sig i:nth-child(3) { height: 8px; }
.sbar .sig i:nth-child(4) { height: 10px; }

.snav {
  text-align: center;
  font-size: 12.5px;
  font-weight: 600;
  color: #123F70;
  padding: 6px 0 8px;
}

.stabs {
  display: flex;
  gap: 13px;
  padding: 2px 14px 9px;
  font-size: 11px;
  color: #5B7189;
  border-bottom: 1px solid rgba(18, 63, 112, 0.07);
}
.stabs b {
  color: #123F70;
  font-weight: 700;
  position: relative;
  padding-bottom: 6px;
}
.stabs b::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--blue-600);
}

.sfeed { padding: 9px 11px; display: flex; flex-direction: column; gap: 9px; }

.scard {
  background: #fff;
  border: 1px solid rgba(18, 63, 112, 0.09);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 1px 2px rgba(18, 63, 112, 0.04);
}

.srow { display: flex; align-items: center; gap: 7px; }
.sava {
  width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 10px; font-weight: 700;
  background: var(--blue-50); color: var(--blue-700);
  flex: 0 0 auto;
}
.smeta { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.sname { font-size: 10.5px; font-weight: 600; color: #1A2E44; }
.stime { font-size: 8.5px; color: #90A3B6; font-family: var(--mono); }

.stag {
  margin-left: auto;
  font-size: 8.5px;
  color: var(--blue-700);
  background: var(--blue-50);
  border-radius: 999px;
  padding: 2px 6px;
  white-space: nowrap;
}

.stxt {
  margin: 7px 0 0;
  font-size: 10.5px;
  line-height: 1.6;
  color: #23384D;
}

.simg {
  margin-top: 7px;
  height: 62px;
  border-radius: 8px;
  background: #E9F1FA;
  border: 1px dashed rgba(30, 95, 168, 0.22);
  display: grid;
  place-items: center;
  color: #6C93B8;
  font-size: 9px;
  font-family: var(--mono);
  letter-spacing: 0.06em;
}

.sacts {
  display: flex;
  gap: 14px;
  margin-top: 8px;
  font-size: 9px;
  color: #8B9DAF;
  font-family: var(--mono);
}

.sprice { margin: 6px 0 0; display: flex; align-items: baseline; gap: 7px; }
.sprice b { font-size: 13px; color: var(--pink); font-family: var(--mono); letter-spacing: -0.02em; }
.sprice span { font-size: 9px; color: #8B9DAF; }

.sava.pink { background: var(--pink-50); color: var(--pink); }

.squote {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: 11px;
  line-height: 1.9;
  color: #16283A;
}

.ssq {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--blue-600);
  background: var(--blue-50);
  border-radius: 5px;
  padding: 4px 6px;
  display: flex;
  justify-content: space-between;
}

.screens-cap {
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--text-3);
  text-align: center;
}

.sbar-b {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 7px 8px 14px;
  border-top: 1px solid rgba(18, 63, 112, 0.07);
  background: rgba(255, 255, 255, 0.92);
  font-size: 8.5px;
  color: #8B9DAF;
}
.sbar-b span { display: flex; flex-direction: column; align-items: center; gap: 3px; padding-top: 2px; }
.sbar-b span.on { color: var(--blue-600); font-weight: 600; }
.sbar-b span::before {
  content: "";
  width: 4px; height: 4px; border-radius: 50%;
  background: transparent;
}
.sbar-b span.on::before { background: currentColor; }

/* ============================== 事实条 ============================== */

.facts {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.facts-in {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.fact {
  padding: 26px 26px 26px 0;
  border-left: 1px solid var(--line-soft);
  padding-left: 26px;
}
.fact:first-child { border-left: 0; padding-left: 0; }

.fact b {
  display: block;
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--blue-700);
  line-height: 1.1;
}
.fact b small { font-size: 12px; font-weight: 500; letter-spacing: 0; color: var(--text-3); margin-left: 4px; }
.fact p { margin: 7px 0 0; font-size: 12.5px; color: var(--text-3); line-height: 1.6; }

/* ============================== 区块 ============================== */

.sec { padding: 92px 0; }
.sec-tight { padding: 64px 0; }
.sec-line { border-top: 1px solid var(--line); }

.sec-hd { max-width: 640px; }
.sec-hd h2 {
  margin: 14px 0 0;
  text-wrap: balance;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.28;
  letter-spacing: -0.028em;
  font-weight: 800;
}
.sec-hd p { margin: 14px 0 0; font-size: 15.5px; color: var(--text-2); line-height: 1.85; }

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--blue-600);
}

/* ------------------------- 模块（左右交替） ------------------------- */

.mod {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 54px 0;
  border-bottom: 1px solid var(--line-soft);
}
.mod:last-of-type { border-bottom: 0; }
.mod.flip .mod-txt { order: 2; }
.mod.flip .mod-vis { order: 1; }

.mod-txt h3 {
  margin: 12px 0 0;
  text-wrap: balance;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -0.025em;
  line-height: 1.35;
  font-weight: 700;
}

.mod-txt > p {
  margin: 12px 0 0;
  font-size: 15.5px;
  color: var(--text-2);
  line-height: 1.85;
}

.mod-list { list-style: none; margin: 22px 0 0; padding: 0; }
.mod-list li {
  position: relative;
  padding-left: 22px;
  margin: 9px 0;
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.7;
}
.mod-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--blue-200);
}
.mod-list b { color: var(--text); font-weight: 600; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-700);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: 999px;
  padding: 4px 11px;
}
.chip.pink { color: var(--pink); background: var(--pink-50); border-color: #FFD9E3; }

/* 模块右侧的卡片/示意 */
.mod-vis { display: flex; justify-content: center; }

.sheet {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px;
  box-shadow: var(--shadow-card);
}

.sheet-top {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--mono);
  letter-spacing: 0.04em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}
.sheet-top .sq { width: 8px; height: 8px; border-radius: 2px; background: var(--blue-200); }

.flow { margin-top: 16px; position: relative; }
.flow-step {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 12px;
  padding-bottom: 18px;
  position: relative;
}
.flow-step:last-child { padding-bottom: 0; }
.flow-step::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 26px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}
.flow-step:last-child::before { display: none; }
.flow-n {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  background: var(--blue-50);
  color: var(--blue-700);
  border: 1px solid var(--blue-100);
  position: relative;
  z-index: 1;
}
.flow-b b { display: block; font-size: 14px; font-weight: 600; }
.flow-b span { display: block; font-size: 12.5px; color: var(--text-3); line-height: 1.6; margin-top: 2px; }

.code-line {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--blue-50);
  border: 1px dashed var(--blue-200);
  border-radius: var(--r-md);
  padding: 11px 14px;
}
.code-line small { font-size: 11.5px; color: var(--blue-700); }
.code-line b { font-family: var(--mono); font-size: 17px; letter-spacing: 0.24em; color: var(--blue-700); }

/* 闲置卡示意 */
.gcard-img {
  height: 138px;
  border-radius: 10px;
  background: #E9F1FA;
  background-image: linear-gradient(120deg, rgba(30, 95, 168, 0.12), rgba(30, 95, 168, 0.03));
  display: grid;
  place-items: center;
  color: var(--blue-300);
}
.gcard-img span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: #7FA0C2;
}
.gcard h4 { margin: 13px 0 0; font-size: 15px; font-weight: 600; line-height: 1.4; }
.gcard .gmeta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 9px; }
.gmeta span {
  font-size: 11.5px;
  color: var(--text-3);
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 2px 7px;
}
.gcard .gfoot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-top: 13px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}
.gcard .gfoot b { font-family: var(--mono); font-size: 21px; color: var(--pink); letter-spacing: -0.02em; }
.gcard .gfoot span { font-size: 12px; color: var(--text-3); }

/* ------------------------- 心声：唯一深蓝满幅块 ------------------------- */

.voice {
  background: var(--blue-700);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  color: #E8F1FB;
  padding: 84px 0;
}

.voice-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 56px;
  align-items: center;
}

.voice h2 {
  margin: 14px 0 0;
  text-wrap: balance;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.3;
  letter-spacing: -0.028em;
  font-weight: 800;
  color: #fff;
}
.voice .kicker { color: var(--blue-200); }
.voice p { margin: 16px 0 0; font-size: 15px; line-height: 1.9; color: #C6D9EE; }
.voice .note {
  margin-top: 22px;
  padding-left: 14px;
  border-left: 2px solid var(--blue-300);
  font-size: 13px;
  color: #A9C6E4;
  line-height: 1.8;
}

.quote-card {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 26px 28px 22px;
  color: var(--text);
  box-shadow: 0 30px 60px -34px rgba(3, 20, 40, 0.85);
}
.quote-top { display: flex; align-items: center; gap: 10px; }
.quote-ava {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--pink-50);
  color: var(--pink);
  display: grid; place-items: center;
  font-size: 15px; font-weight: 700;
}
.quote-who { line-height: 1.3; }
.quote-who b { display: block; font-size: 13.5px; font-weight: 600; }
.quote-who span { font-size: 11px; color: var(--text-3); font-family: var(--mono); }
.quote-card blockquote {
  margin: 16px 0 0;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.9;
  letter-spacing: 0.01em;
  color: #16283A;
}
.quote-foot {
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  gap: 16px;
  font-size: 11.5px;
  color: var(--text-3);
  font-family: var(--mono);
}

/* ============================== 场景（一天里的四件事） ============================== */

.scenes { margin-top: 38px; border-top: 1px solid var(--line); }

.scene {
  display: grid;
  grid-template-columns: 118px 1fr 1fr;
  gap: 28px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}
.scene time {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--blue-600);
  letter-spacing: 0.02em;
  line-height: 1.9;
}
.scene h4 { margin: 0; font-size: 16px; font-weight: 600; line-height: 1.6; }
.scene p { margin: 0; font-size: 14px; color: var(--text-2); line-height: 1.75; }
.scene p b { color: var(--text); font-weight: 600; }

/* ============================== 治理 ============================== */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow-card);
}
.card h4 { margin: 12px 0 0; font-size: 15.5px; font-weight: 600; }
.card p { margin: 8px 0 0; font-size: 13.5px; color: var(--text-2); line-height: 1.75; }

.ico {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--blue-50);
  color: var(--blue-700);
  display: grid; place-items: center;
}
.ico svg { width: 18px; height: 18px; fill: currentColor; }
.ico.pink { background: var(--pink-50); color: var(--pink); }

/* ============================== 底部行动区 ============================== */

.cta {
  background: var(--blue-600);
  background-image: linear-gradient(150deg, #2468B2, #123F70 78%);
  color: #fff;
  padding: 68px 0;
}
.cta-grid {
  display: block;
}
.cta h2 {
  margin: 0;
  font-size: clamp(25px, 3vw, 36px);
  line-height: 1.3;
  letter-spacing: -0.028em;
  font-weight: 800;
  color: #fff;
  text-wrap: balance;
  max-width: 20em;
}
.cta p { margin: 14px 0 0; font-size: 15px; line-height: 1.85; color: #C9DCF0; max-width: 40em; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.cta .btn-primary { background: #fff; color: var(--blue-700); }
.cta .btn-primary:hover { background: #EAF2FB; }
.cta .btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.cta .btn-ghost:hover { background: rgba(255, 255, 255, 0.1); border-color: #fff; }

/* 三端获取：三张等高的白卡，视觉区统一 96px，二维码也放在同一位置 */
.get-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}
.get-card {
  background: #fff;
  border-radius: var(--r-lg);
  padding: 14px 16px 16px;
  color: var(--text);
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 50px -30px rgba(4, 20, 38, 0.9);
}
.get-vis {
  height: 148px;
  border-radius: 10px;
  background: var(--blue-50);
  color: var(--blue-700);
  display: grid;
  place-items: center;
}
.get-vis.qr { background: var(--blue-50); color: var(--blue-600); }
.get-vis.qr img {
  width: 136px;
  height: 136px;
  padding: 6px;
  border-radius: 10px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 6px 14px -10px rgba(11, 40, 70, 0.6);
}
/* 桌面看二维码，手机上看文字入口 */
.get-vis.qr svg { display: none; }
.only-mob { display: none; }
.get-vis svg { width: 48px; height: 48px; fill: currentColor; }
.get-vis.qr svg { width: 34px; height: 34px; }
.get-vis.qr small { display: none; }
.get-vis.qr small { font-size: 10px; letter-spacing: 0.04em; }
.get-body { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.get-card b { display: block; margin-top: 12px; font-size: 14.5px; font-weight: 600; }
.get-card .get-sub { display: block; margin-top: 3px; font-size: 12px; color: var(--text-3); line-height: 1.6; }
.get-act {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--blue-600);
  letter-spacing: 0.02em;
  border-bottom: 1px dashed var(--blue-200);
  align-self: flex-start;
  padding-bottom: 2px;
}

/* ============================== 页脚 ============================== */

.ft { background: #fff; border-top: 1px solid var(--line); padding: 54px 0 28px; }

.ft-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.95fr 0.95fr 1.5fr;
  gap: 34px;
}
.ft-brand p { margin: 14px 0 0; font-size: 13px; color: var(--text-3); line-height: 1.85; max-width: 26em; }
.ft h5 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.ft ul { list-style: none; margin: 0; padding: 0; }
.ft li { margin: 8px 0; font-size: 13px; color: var(--text-2); line-height: 1.7; }
.ft a:hover { color: var(--blue-600); }
.ft .mono { font-family: var(--mono); font-size: 12px; color: var(--text-2); }


.ft-bottom {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-3);
}

/* ============================== 产品介绍页 ============================== */

.phero { padding: 64px 0 40px; }
.phero h1 { font-size: clamp(32px, 4vw, 50px); max-width: 20em; }
.phero .lead { max-width: 40em; }

.pmeta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 24px;
}
.pmeta span {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 11px;
}

.anchor-bar {
  position: sticky;
  top: 66px;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.anchor-in { display: flex; gap: 24px; overflow-x: auto; padding: 12px 0; }
.anchor-in a {
  font-size: 13.5px;
  color: var(--text-2);
  white-space: nowrap;
  padding: 2px 0;
}
.anchor-in a:hover { color: var(--blue-600); }

/* 功能清单 */
.fgroup { padding: 40px 0; border-bottom: 1px solid var(--line-soft); }
.fgroup:last-child { border-bottom: 0; }
.fgroup-hd {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  column-gap: 44px;
  align-items: baseline;
  margin-bottom: 26px;
}
.fgroup-tag { grid-column: 1 / -1; margin-bottom: 10px; }
.fgroup-hd h3 {
  grid-column: 1;
  margin: 0;
  font-size: clamp(21px, 2.2vw, 27px);
  letter-spacing: -0.022em;
  font-weight: 700;
  line-height: 1.35;
  text-wrap: balance;
}
.fgroup-hd p {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.85;
}

.frows { border-top: 1px solid var(--line); }
.frow {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 24px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}
.frow dt { font-size: 14px; font-weight: 600; color: var(--text); }
.frow dd { margin: 0; font-size: 14px; color: var(--text-2); line-height: 1.75; }
.frow dd em { font-style: normal; color: var(--text-3); font-size: 13px; }

/* 三屏示意 */
.screens { display: grid; grid-template-columns: repeat(3, 1fr); grid-auto-rows: 1fr; gap: 22px; margin-top: 8px; align-items: stretch; }
.screens .phone {
  width: 100%;
  max-width: 272px;
  height: 100%;
  margin: 0 auto;
  padding: 7px;
  border-radius: 34px;
  display: flex;
  flex-direction: column;
}
.screens .screen {
  border-radius: 28px;
  aspect-ratio: auto;
  min-height: 452px;
  flex: 1;
}
.screens .sfeed { gap: 7px; padding: 8px; }
.screens .stabs { gap: 10px; font-size: 10px; padding: 2px 10px 8px; }
.screens .snav { font-size: 11.5px; }
.screens .sbar { padding: 7px 16px 1px; font-size: 9.5px; }

/* 场景卡 */
.sc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 34px; }
.sc {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.sc h4 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -0.015em; }
.sc .sc-who {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--blue-600);
}
.sc dl { margin: 16px 0 0; }
.sc dt { font-size: 11.5px; color: var(--text-3); letter-spacing: 0.06em; margin-top: 10px; }
.sc dd { margin: 3px 0 0; font-size: 14px; color: var(--text-2); line-height: 1.75; }
.sc dd b { color: var(--text); font-weight: 600; }

/* 对比表 */
.cmp { width: 100%; border-collapse: collapse; margin-top: 30px; background: #fff; }
.cmp caption { text-align: left; font-size: 12.5px; color: var(--text-3); padding-bottom: 10px; }
.cmp th, .cmp td {
  text-align: left;
  padding: 13px 16px;
  font-size: 13.5px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.7;
}
.cmp thead th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-3);
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}
.cmp thead th:first-child { border-top-left-radius: 10px; }
.cmp thead th:last-child { border-top-right-radius: 10px; }
.cmp tbody th { font-weight: 600; color: var(--text); width: 132px; }
.cmp td.us { background: rgba(232, 240, 250, 0.6); color: var(--blue-700); font-weight: 500; }
.cmp-wrap { border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-card); }

/* 架构 */
.arch { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 30px; }
.arch .card { padding: 18px; }
.arch h5 { margin: 0; font-size: 13.5px; font-weight: 600; }
.arch p { margin: 6px 0 0; font-size: 12px; color: var(--text-3); line-height: 1.7; }
.arch .k { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.08em; color: var(--blue-600); }

/* 时间线 */
.line { margin-top: 30px; border-left: 1px solid var(--line); padding-left: 22px; }
.li { position: relative; padding: 0 0 22px; }
.li::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--blue-200);
}
.li.done::before { background: var(--blue-600); border-color: var(--blue-600); }
.li time { font-family: var(--mono); font-size: 11.5px; color: var(--text-3); }
.li b { display: block; margin-top: 1px; font-size: 14.5px; font-weight: 600; }
.li span { display: block; font-size: 13px; color: var(--text-2); line-height: 1.7; margin-top: 2px; }

/* FAQ */
.faq { margin-top: 28px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 34px 16px 0;
  position: relative;
  font-size: 15px;
  font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 14px;
  font-family: var(--mono);
  font-size: 17px;
  color: var(--blue-600);
  font-weight: 400;
}
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 0 0 18px; font-size: 14px; color: var(--text-2); line-height: 1.85; max-width: 52em; }

/* ============================== 响应式 ============================== */

@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .stage { order: 2; }
  .stage-tag { right: 2px; bottom: 10px; }
  .facts-in { grid-template-columns: 1fr 1fr; }
  .fact { padding: 22px 20px; }
  .fact:nth-child(3) { border-left: 0; padding-left: 20px; }
  .fact:nth-child(3), .fact:nth-child(4) { border-top: 1px solid var(--line-soft); }
  .mod { grid-template-columns: 1fr; gap: 34px; }
  .mod.flip .mod-txt, .mod.flip .mod-vis { order: 0; }
  .voice-grid { grid-template-columns: 1fr; gap: 32px; }
  .scene { grid-template-columns: 96px 1fr; row-gap: 8px; }
  .scene p { grid-column: 2; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .get-grid { gap: 10px; }
  .ft-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .fgroup-hd { grid-template-columns: 1fr; column-gap: 0; row-gap: 10px; }
  .fgroup-hd h3, .fgroup-hd p { grid-column: 1; }
  .screens { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .arch { grid-template-columns: 1fr 1fr; }
  .sc-grid { grid-template-columns: 1fr; }
  .frow { grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 720px) {
  body { font-size: 15px; }
  .hd-in { height: 60px; gap: 14px; }
  .nav { display: none; }
  .brand-sub { display: none; }
  .hero { padding: 46px 0 40px; }
  .lead, .sec-hd p { font-size: 15px; }
  .sec { padding: 60px 0; }
  .sec-tight { padding: 44px 0; }
  .facts-in { grid-template-columns: 1fr; }
  .fact { border-left: 0; padding: 18px 0; border-top: 1px solid var(--line-soft); }
  .fact:first-child { border-top: 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .phone { width: 268px; padding: 8px; }
  .stage-tag { display: none; }
  .mod { padding: 38px 0; }
  .voice { padding: 54px 0; }
  .quote-card { padding: 20px; }
  .quote-card blockquote { font-size: 17px; }
  .scene { grid-template-columns: 1fr; gap: 2px; }
  .scene p { grid-column: 1; }
  .screens {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 12px;
  }
  .screens .phone { flex: 0 0 68%; scroll-snap-align: center; }
  .screens-cap { text-align: left; }
  .anchor-bar { top: 60px; }
  .anchor-in { gap: 18px; padding: 10px 0; }
  .ft-grid { grid-template-columns: 1fr; }
  .cta { padding: 48px 0; }
  .get-grid { grid-template-columns: 1fr; }
  .get-card { flex-direction: row; align-items: center; gap: 14px; padding: 12px 14px; }
  .get-card .get-vis { width: 72px; height: 72px; flex: 0 0 72px; }
  .get-card .get-vis svg { width: 30px; height: 30px; }
  .get-card .get-vis.qr svg { display: block; width: 28px; height: 28px; }
  .get-vis.qr img { display: none; }
  .only-mob { display: inline; }
  .only-desk { display: none; }
  .get-card b { margin-top: 0; }
  .get-body { flex: 1; min-width: 0; }
  .get-act { margin-top: 6px; border-bottom: 0; padding-bottom: 0; }
  .cmp th, .cmp td { padding: 11px 12px; font-size: 12.5px; }
  .cmp tbody th { width: 88px; }
  .arch { grid-template-columns: 1fr; }
  .frow { padding: 13px 0; }
}

/* 移动端：对比表改为逐条卡片，避免四列挤成竖排单字 */
@media (max-width: 720px) {
  .cmp-wrap { overflow: visible; }
  .cmp, .cmp tbody, .cmp tr, .cmp th, .cmp td { display: block; width: auto; }
  .cmp thead { display: none; }
  .cmp caption { display: block; padding: 14px 16px 12px; font-size: 12px; line-height: 1.7; }
  .cmp tr {
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    background: #fff;
  }
  .cmp tr:last-child { border-bottom: 0; }
  .cmp tbody th {
    width: auto;
    padding: 0 0 8px;
    font-size: 14px;
    color: var(--blue-700);
  }
  .cmp td {
    border: 0;
    padding: 6px 0 0;
    font-size: 13.5px;
    line-height: 1.7;
  }
  .cmp td::before {
    content: attr(data-label);
    display: block;
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--text-3);
    margin-bottom: 2px;
  }
  .cmp td.us { background: transparent; color: var(--text); font-weight: 400; }
  .cmp td.us strong, .cmp td.us { font-weight: 500; }
}

@media (max-width: 400px) {
  .hd-cta .btn-ghost { display: none; }
}

/* ============================== 法务页（隐私政策 / 用户协议） ============================== */

.legal-hero { padding: 56px 0 26px; }
.legal-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 3.4vw, 40px);
  letter-spacing: -0.03em;
  line-height: 1.25;
  font-weight: 800;
}
.legal-meta {
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-3);
}

.legal-wrap {
  display: grid;
  grid-template-columns: 208px 1fr;
  gap: 56px;
  align-items: start;
  padding-bottom: 88px;
}

.toc { position: sticky; top: 92px; min-width: 0; }
.toc h2 {
  margin: 0 0 12px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-3);
}
.toc ol { list-style: none; margin: 0; padding: 0 0 0 12px; border-left: 1px solid var(--line); }
.toc li { margin: 0; }
.toc a {
  display: block;
  padding: 5px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-2);
  transition: color 0.16s var(--ease);
}
.toc a:hover { color: var(--blue-600); }

.doc { max-width: 748px; min-width: 0; }
.doc > p:first-of-type { margin-top: 0; }
.doc h2 {
  margin: 44px 0 0;
  font-size: 20px;
  line-height: 1.4;
  letter-spacing: -0.015em;
  font-weight: 700;
  scroll-margin-top: 88px;
}
.doc h3 { margin: 22px 0 0; font-size: 15.5px; font-weight: 600; }
.doc p { margin: 11px 0 0; font-size: 15px; line-height: 1.95; color: var(--text-2); }
.doc strong { color: var(--text); font-weight: 600; }
.doc ul { list-style: none; margin: 10px 0 0; padding: 0; }
.doc ul li {
  position: relative;
  padding-left: 18px;
  margin: 7px 0;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text-2);
}
.doc ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue-200);
}
.doc a { color: var(--blue-600); text-decoration: underline; text-underline-offset: 3px; }

.callout {
  margin: 30px 0 0;
  padding: 16px 20px;
  background: var(--blue-50);
  border-left: 3px solid var(--blue-600);
  border-radius: 0 12px 12px 0;
}
.callout b { display: block; font-size: 13.5px; font-weight: 600; color: var(--blue-700); }
.callout p { margin: 6px 0 0; font-size: 14px; line-height: 1.85; color: var(--text-2); }
.callout.warn { background: #FFFBEB; border-left-color: var(--warning-500); }
.callout.warn b { color: var(--warning-700); }
.callout + p { margin-top: 20px; }

/* 法务页里的信息表 */
.dtable { width: 100%; border-collapse: collapse; margin-top: 16px; }
.dtable th, .dtable td {
  text-align: left;
  vertical-align: top;
  padding: 11px 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-2);
  border-bottom: 1px solid var(--line-soft);
}
.dtable thead th {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-3);
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}
.dtable tbody td:first-child { color: var(--text); font-weight: 500; width: 30%; }
.dtable tbody tr:last-child td { border-bottom: 0; }
.dtable-wrap { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }

.doc-end {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.9;
}
.doc-end b { color: var(--text-2); font-weight: 500; }

@media (max-width: 1000px) {
  .legal-wrap { grid-template-columns: 1fr; gap: 30px; }
  .toc { position: static; }
  .toc ol {
    display: flex;
    gap: 8px;
    max-width: 100%;
    overflow-x: auto;
    border-left: 0;
    padding: 0 0 6px;
    -webkit-overflow-scrolling: touch;
  }
  .toc li { flex: 0 0 auto; border: 1px solid var(--line); background: #fff; border-radius: 999px; }
  .toc a { padding: 5px 11px; font-size: 12.5px; white-space: nowrap; }
  .doc { max-width: none; }
}

@media (max-width: 720px) {
  .legal-hero { padding: 40px 0 18px; }
  .doc h2 { margin-top: 34px; font-size: 18px; }
  .doc p, .doc ul li { font-size: 14.5px; line-height: 1.95; }
  /* 信息表逐条展开，避免三列把中文挤成竖排 */
  .dtable-wrap { border: 0; }
  .dtable, .dtable tbody, .dtable tr, .dtable td { display: block; width: auto; }
  .dtable thead { display: none; }
  .dtable tr { padding: 12px 0; border-bottom: 1px solid var(--line-soft); }
  .dtable td { border: 0; padding: 2px 0; }
  .dtable tbody td:first-child { width: auto; padding-bottom: 4px; }
  .dtable td::before {
    content: attr(data-label);
    display: block;
    font-size: 10.5px;
    letter-spacing: 0.06em;
    color: var(--text-3);
  }
}

@media print {
  .toc, .hd, .ft, .skip { display: none; }
  .legal-wrap { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

@media print {
  .hd, .anchor-bar, .cta, .skip { display: none; }
  body { background: #fff; }
}