/* ============================================================
   ⛔ 部署红线（改动本文件前必读）
   1. 本文件是学习机子网页的独立样式表，**严禁**在 machine/index.html 中
      引入官网的 /css/style.css —— 官网样式表后半段还有一层主题覆盖，
      且它的 container、btn、nav、hero、faq-item、stat、topbar 等类名与本页是
      同名或近名关系，引入即互相污染。
      （注：本行刻意不写成「点 + 类名」的形式，否则会被 tools/check_class_conflict.py
        的 [1] 项当成真的用了官网类名而误报。）
   2. 本页所有可能与官网撞名的类，已统一加 mc- 前缀（改造已完成，共 32 个类）。
      门禁 tools/check_class_conflict.py 第 [1] 项现为 0 命中；改类名前先跑它。
      再需要批量改名时用 tools/rename_classes.py，不要手工逐处改。
   3. 色板对齐官网现网生效主题：品牌紫 #660874 / 品牌红 #B01F24 / 金 #E8A800。
      这三个值取自官网自身的品牌色变量，属**同源继承**，不构成任何机构背书。
      页面文案与注释里不得出现任何高校名称、校徽、校训。
   ============================================================ */
/* ============================================================
   水木硅谷 Code · 4–18 岁编程学习机 · 设计系统
   视觉方向：低龄段友好明快 + 高龄段工程师的克制与学术可信（一套页面同时说服家长与竞赛生）
   主色：品牌紫（主色 · 沉稳）+ 品牌红（行动与强调）+ 金（启蒙段与序号）+ 终端深紫底（真实感）
   分段语义：金 = 启蒙与图形化 / 亮紫 = Python 过渡 / 紫 = C++ 与信奥 / 深紫 = 拔尖冲刺
   严禁：任何机构的校徽、校训、专属标识等可作背书用的视觉符号
   严禁：任何暗示与赛事主办方存在官方关系的视觉符号（环境一致性只能作事实陈述）
   ============================================================ */

/* 色板来源：www.xinxixue.tech（北京水木硅谷科技有限公司官网）css/style.css :root
   —— 全站配色与自有官网保持同源，学习机落地页作为官网的产品线延伸 */
:root {
  /* —— 品牌主轴：对齐官网现网生效主题（紫 + 红 + 金）—— */
  --purple: #660874;        /* 品牌紫 · 主色 */
  --purple-deep: #4A0E63;   /* 深紫 · 深底与终端 */
  --purple-light: #7B2CBF;  /* 亮紫 · 强调与过渡段 */
  --purple-soft: #F1EAF7;   /* 浅紫底 */
  --brand-red: #B01F24;     /* 品牌红 · 行动按钮与强调 */
  --red-soft: #FBE9EB;
  --gold: #E8A800;          /* 金 · 低龄段与序号 */
  --gold-l: #FFF8E1;

  /* —— 语义别名：沿用旧变量名，避免全站重写 —— */
  --blue: var(--purple);
  --blue-deep: var(--purple-deep);
  --blue-light: var(--purple-light);
  --blue-soft: var(--purple-soft);
  --orange: var(--brand-red);
  --orange-soft: var(--red-soft);
  --ink: var(--purple);     /* 标题 / 品牌 */
  --ink-2: var(--purple-deep);
  --ink-3: var(--gray);
  --gray: #4C4656;          /* 正文灰 */

  /* 分段语义色：金=启蒙与图形化 ／ 亮紫=Python ／ 紫=C++ 信奥 ／ 深紫=拔尖 */
  --kid: var(--gold);       /* 低龄段 · 金（活泼，避开红） */
  --kid-d: #A67900;
  --kid-l: var(--gold-l);
  --jade: var(--purple-light);  /* Python 过渡段 */
  --jade-d: var(--purple);
  --jade-l: var(--purple-soft);
  --oi: var(--purple);          /* C++ 与信奥段 */
  --oi-d: var(--purple-deep);
  --oi-l: var(--purple-soft);

  /* —— 终端 / 代码块（深紫底 + 代码高亮色）—— */
  --term: var(--purple-deep);
  --term-2: #5C1A78;
  --term-line: #7B3A9E;
  --ac: #16C784;            /* Accepted */
  --wa: #C8102E;            /* Wrong Answer */
  --tle: var(--gold);       /* Time Limit Exceeded */
  --re: #7B2CBF;            /* Runtime Error */

  --paper: #FFFFFF;
  --bg: #F6F3FA;            /* 米白底 */
  --line: #E4DFEC;
  --line-2: #CDC4DC;
  --text: #221D2B;
  --muted: var(--gray);
  --muted-2: #7A7288;

  --s-math: var(--purple);
  --s-phys: var(--purple-light);
  --s-chem: var(--gold);
  --s-bio: #16A34A;
  --s-info: var(--purple-deep);

  --radius: 6px;            /* 官网主题圆角（小圆角，庄重感） */
  --radius-lg: 10px;
  --shadow: 0 10px 30px rgba(74, 14, 99, .10);
  --shadow-lg: 0 20px 50px rgba(74, 14, 99, .16);
  --nav-h: 64px;
  --maxw: 1160px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Segoe UI", Roboto, "Hiragino Sans GB", sans-serif;
  /* 标题用衬线体，与官网主题一致（庄重、学术感） */
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong",
           "SimSun", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  margin: 0; font-family: var(--sans); font-size: 16px; line-height: 1.7;
  color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--jade-d); text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.35; font-weight: 700; letter-spacing: -.01em;
  font-family: var(--serif); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.mc-container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 84px 0; }
section.tint { background: var(--paper); }
section.deep { background: var(--ink-2); color: #F3EEF9; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--jade); color: #fff; padding: 10px 18px; border-radius: 8px;
}
.skip-link:focus { left: 14px; top: 14px; }

/* ---------------- 导航 ---------------- */
.mc-nav {
  position: sticky; top: 0; z-index: 60; height: var(--nav-h);
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.mc-nav .mc-container { height: 100%; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink); font-size: 17px; }
.brand .mark {
  width: 32px; height: 32px; border-radius: 9px; background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 15px;
}
.mc-nav-links { display: flex; gap: 22px; margin-left: auto; font-size: 14.5px; }
.mc-nav-links a { color: var(--ink-3); padding: 6px 0; border-bottom: 2px solid transparent; }
.mc-nav-links a:hover, .mc-nav-links a.mc-active { color: var(--ink); border-bottom-color: var(--jade); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; cursor: pointer; padding: 8px; }

/* ---------------- 通用排版 ---------------- */
.eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: .14em; font-weight: 700;
  color: var(--jade-d); text-transform: uppercase; margin-bottom: 12px;
}
.sec-head { max-width: 760px; margin-bottom: 44px; }
.sec-title { font-size: 32px; color: var(--ink); margin-bottom: 14px; }
.sec-sub { font-size: 16.5px; color: var(--muted); }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
section.deep .sec-title { color: #fff; }
section.deep .sec-sub { color: #C9BFD8; }
.center { text-align: center; }

.mc-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 10px; font-size: 15px; font-weight: 700;
  border: 1px solid transparent; cursor: pointer; transition: .18s;
}
.mc-btn-primary { background: linear-gradient(135deg, #C8102E, #8A1420); color: #fff;
  box-shadow: 0 8px 20px rgba(176, 31, 36, .30); }
.mc-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(176, 31, 36, .42); }
.mc-btn-ghost { background: transparent; color: var(--blue); border: 2px solid var(--blue-light); }
.mc-btn-ghost:hover { background: var(--blue-soft); border-color: var(--blue); color: var(--blue); }
.mc-btn-sm { padding: 9px 18px; font-size: 14px; }

.note { font-size: 13px; color: var(--muted-2); line-height: 1.65; }
section.deep .note { color: #A79CB8; }
.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
}
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }

/* ---------------- Hero ---------------- */
.mc-hero { background: var(--paper); padding: 76px 0 64px; }
.mc-hero .split { gap: 56px; }
.hero-title { font-size: 46px; color: var(--ink); margin-bottom: 18px; letter-spacing: -.02em; }
.hero-desc { font-size: 17px; color: var(--muted); margin-bottom: 28px; }
.mc-hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  border-top: 1px solid var(--line); padding-top: 24px;
}
.hero-stats .mc-stat b { display: block; font-size: 30px; color: var(--ink); line-height: 1.2; }
.hero-stats .mc-stat span { font-size: 13px; color: var(--muted); }

.device {
  background: var(--ink); border-radius: 26px; padding: 18px; box-shadow: var(--shadow);
}
.device .screen {
  background: #4A0E63; border-radius: 14px; padding: 22px 18px; min-height: 330px;
  display: flex; flex-direction: column; gap: 12px;
}
.screen-line { height: 9px; border-radius: 6px; background: rgba(255, 255, 255, .1); }
.screen-line.short { width: 55%; }
.subject-chips { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 6px; }
.subject-chips i {
  display: block; height: 34px; border-radius: 8px; opacity: .9;
}
.chip-math { background: var(--s-math); }
.chip-phys { background: var(--s-phys); }
.chip-chem { background: var(--s-chem); }
.chip-bio { background: var(--s-bio); }
.chip-info { background: var(--s-info); }

/* ---------------- 学科卡 ---------------- */
.sub-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.sub-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 18px; transition: .18s;
}
.sub-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.sub-card .glyph { width: 46px; height: 46px; margin-bottom: 14px; }
.sub-card h3 { font-size: 17px; color: var(--ink); margin-bottom: 8px; }
.sub-card p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.sub-card .tagline { font-size: 13px; font-weight: 700; margin-bottom: 6px; }
.t-math { color: var(--s-math); } .t-phys { color: var(--s-phys); }
.t-chem { color: var(--s-chem); } .t-bio { color: var(--s-bio); }
.t-info { color: var(--s-info); }

/* ---------------- 路径 ---------------- */
.path-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.path-step { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; }
.path-step .lv { font-size: 12px; font-weight: 700; letter-spacing: .1em; color: var(--jade-d); }
.path-step h3 { font-size: 18px; color: var(--ink); margin: 8px 0 10px; }
.path-step p { font-size: 14px; color: var(--muted); }

/* ---------------- 列表 ---------------- */
.feature-list li { display: flex; gap: 12px; padding: 13px 0; border-bottom: 1px dashed var(--line); }
.feature-list li:last-child { border-bottom: 0; }
.feature-list .tick {
  flex: none; width: 22px; height: 22px; border-radius: 50%; margin-top: 3px;
  background: var(--jade-l); color: var(--jade-d); font-size: 13px;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.feature-list b { display: block; font-size: 15px; color: var(--ink); }
.feature-list span { font-size: 13.8px; color: var(--muted); }
section.deep .feature-list b { color: #F3EEF9; }
section.deep .feature-list span { color: #C9BFD8; }
section.deep .feature-list li { border-bottom-color: rgba(255, 255, 255, .12); }
section.deep .feature-list .tick { background: rgba(23, 166, 127, .18); color: #6FE0B6; }

/* ---------------- 政策区块 ---------------- */
.fact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 32px; }
.fact {
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius); padding: 22px 20px;
}
.fact h3 { font-size: 16px; color: #fff; margin-bottom: 10px; }
.fact p { font-size: 13.8px; color: #C9BFD8; line-height: 1.7; }
.stance { border-top: 1px solid rgba(255, 255, 255, .14); padding-top: 24px; }
.stance li { display: flex; gap: 12px; padding: 9px 0; font-size: 15px; color: #DCE7F1; }
.stance .no { flex: none; color: #FF9B8A; font-weight: 700; }

/* ---------------- 表格 ---------------- */
.tbl-scroll { overflow-x: auto; }
table.tbl { width: 100%; min-width: 660px; border-collapse: collapse; font-size: 14.5px; }
table.tbl th, table.tbl td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); }
table.tbl thead th { color: var(--muted); font-weight: 700; font-size: 13.5px; }
table.tbl tbody th { font-weight: 700; color: var(--ink); font-size: 14.5px; }
table.tbl td.pending { color: var(--muted-2); }
table.tbl .us { background: var(--jade-l); font-weight: 700; color: var(--jade-d); }
table.tbl thead .us { background: transparent; }

/* ---------------- FAQ ---------------- */
.faq { max-width: 860px; margin: 0 auto; }
.mc-faq-item { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; }
.mc-faq-q {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  padding: 18px 22px; font-size: 15.5px; font-weight: 700; color: var(--ink);
  font-family: inherit; display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.mc-faq-q i { flex: none; width: 18px; height: 18px; position: relative; }
.mc-faq-q i::before, .mc-faq-q i::after {
  content: ""; position: absolute; background: var(--ink-3); border-radius: 2px;
  transition: .2s;
}
.mc-faq-q i::before { left: 0; top: 8px; width: 18px; height: 2px; }
.mc-faq-q i::after { left: 8px; top: 0; width: 2px; height: 18px; }
.mc-faq-item.mc-open .mc-faq-q i::after { opacity: 0; }
.mc-faq-a { display: none; padding: 0 22px 20px; font-size: 14.5px; color: var(--muted); }
.mc-faq-item.mc-open .mc-faq-a { display: block; }

/* ---------------- 表单 ---------------- */
.lead-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px 28px; box-shadow: var(--shadow); }
.mc-field { margin-bottom: 16px; }
.mc-field label { display: block; font-size: 13.5px; font-weight: 700; color: var(--ink); margin-bottom: 7px; }
.mc-field input, .mc-field select, .mc-field textarea {
  width: 100%; padding: 11px 13px; font-size: 15px; font-family: inherit;
  border: 1px solid var(--line-2); border-radius: 9px; background: #fff; color: var(--text);
}
.mc-field input:focus, .mc-field select:focus, .mc-field textarea:focus { outline: 2px solid var(--jade); outline-offset: 1px; }
.mc-field textarea { min-height: 84px; resize: vertical; }
.mc-field .msg { display: block; font-size: 12.5px; color: #C8102E; margin-top: 6px; min-height: 16px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.focus-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.focus-item { position: relative; }
.focus-item input { position: absolute; opacity: 0; width: 0; height: 0; }
.focus-item span {
  display: inline-block; padding: 8px 15px; font-size: 13.5px; cursor: pointer;
  border: 1px solid var(--line-2); border-radius: 999px; color: var(--ink-3); background: #fff;
}
.focus-item input:checked + span { background: var(--jade-l); border-color: var(--jade); color: var(--jade-d); font-weight: 700; }
.consent { display: flex; gap: 10px; align-items: flex-start; margin: 18px 0; font-size: 13px; color: var(--muted); }
.consent input { margin-top: 4px; }
.demo-note { margin-top: 14px; font-size: 13px; color: var(--muted); background: var(--bg); border-radius: 10px; padding: 12px 14px; }

/* ---------------- 页脚 ---------------- */
footer { background: var(--ink-2); color: #A79CB8; padding: 56px 0 32px; font-size: 13.5px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
footer h4 { color: #fff; font-size: 14px; margin-bottom: 14px; }
footer li { padding: 4px 0; }
footer a { color: #A79CB8; }
footer a:hover { color: #fff; }
.disclaimer { border-top: 1px solid rgba(255, 255, 255, .12); padding-top: 22px; font-size: 12.8px; line-height: 1.75; }

/* ---------------- 进场动画 ---------------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .07s; } .d2 { transition-delay: .14s; } .d3 { transition-delay: .21s; }

/* ---------------- 资质条 ---------------- */
.badge-row {
  display: flex; flex-wrap: wrap; gap: 10px 14px; margin-bottom: 22px;
  font-size: 13.5px; color: var(--ink-3);
}
.badge-row span {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 14px; border: 1px solid var(--line-2); border-radius: 999px; background: var(--paper);
}
.badge-row span::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--jade);
}

/* ---------------- 背书三卡 ---------------- */
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.proof { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; }
.proof .mc-num {
  font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--gold); margin-bottom: 12px;
}
.proof h3 { font-size: 18px; color: var(--ink); margin-bottom: 10px; }
.proof p { font-size: 14.2px; color: var(--muted); line-height: 1.7; }

/* ---------------- 四步闭环 ---------------- */
.loop { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.loop-step { position: relative; padding: 28px 22px 26px; background: var(--paper); border: 1px solid var(--line); }
.loop-step:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.loop-step:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.loop-step + .loop-step { border-left: 0; }
.loop-step .step-no {
  font-size: 30px; font-weight: 700; color: var(--gold); line-height: 1; margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}
.loop-step h3 { font-size: 16.5px; color: var(--ink); margin-bottom: 9px; }
.loop-step p { font-size: 13.6px; color: var(--muted); line-height: 1.7; }
.loop-step::after {
  content: ""; position: absolute; right: -1px; top: 50%; width: 14px; height: 1px;
  background: var(--line-2);
}
.loop-step:last-child::after { display: none; }

/* ---------------- 学段时间轴 ---------------- */
.stage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stage { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 20px; }
.stage .yr { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--jade-d); }
.stage h3 { font-size: 17px; color: var(--ink); margin: 8px 0 10px; }
.stage p { font-size: 13.6px; color: var(--muted); line-height: 1.7; }
.stage.extra { border-color: var(--gold); background: #FDF8EE; }

/* ---------------- 功能矩阵 ---------------- */
.mc-feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tile {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; transition: .18s;
}
.tile:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tile .ico { width: 34px; height: 34px; margin-bottom: 12px; }
.tile h3 { font-size: 16px; color: var(--ink); margin-bottom: 8px; }
.tile p { font-size: 13.4px; color: var(--muted); line-height: 1.65; }

/* ---------------- 场景卡 ---------------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.scene { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; }
.scene .when { font-size: 12.5px; font-weight: 700; letter-spacing: .1em; color: var(--gold); margin-bottom: 10px; }
.scene h3 { font-size: 17px; color: var(--ink); margin-bottom: 9px; }
.scene p { font-size: 13.8px; color: var(--muted); line-height: 1.7; }

/* ---------------- 家长专栏 ---------------- */
.column-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.column-item {
  display: flex; gap: 14px; align-items: flex-start; background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px;
}
.column-item .cat {
  flex: none; font-size: 12px; font-weight: 700; color: var(--jade-d);
  background: var(--jade-l); border-radius: 6px; padding: 3px 9px; margin-top: 2px;
}
.column-item h3 { font-size: 15px; color: var(--ink); font-weight: 500; }

/* ============================================================
   OI 专属组件
   ============================================================ */

/* ---------------- 二合一设备示意 ---------------- */
.device-2in1 { background: var(--ink); border-radius: 22px; padding: 16px 16px 12px; box-shadow: var(--shadow); }
.device-2in1 .screen {
  background: var(--term); border-radius: 12px; padding: 14px 14px 12px;
  min-height: 250px; display: flex; flex-direction: column; gap: 7px;
}
.device-2in1 .kbdeck {
  margin-top: 12px; background: #1B2E47; border-radius: 9px; padding: 9px 10px;
  display: grid; grid-template-columns: repeat(14, 1fr); gap: 3px;
}
.device-2in1 .kbdeck i { display: block; height: 12px; border-radius: 3px; background: rgba(255, 255, 255, .17); }
.device-2in1 .kbdeck i.wide { grid-column: span 3; }
.device-2in1 .kbdeck i.space { grid-column: span 8; background: rgba(255, 255, 255, .10); }

/* ---------------- 终端 / 代码块 ---------------- */
.term { background: var(--term); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.term-bar {
  display: flex; align-items: center; gap: 7px; padding: 11px 15px;
  background: var(--term-2); border-bottom: 1px solid var(--term-line);
}
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--term-line); }
.term-bar i:first-child { background: #E86A5C; }
.term-bar i:nth-child(2) { background: #E8BE4A; }
.term-bar i:nth-child(3) { background: #62C37A; }
.term-bar span { margin-left: 8px; font-size: 12.5px; color: #A895C0; font-family: ui-monospace, "SF Mono", Consolas, monospace; }
.term-body {
  padding: 16px 18px; font-family: ui-monospace, "SF Mono", Consolas, "Courier New", monospace;
  font-size: 13.2px; line-height: 1.85; color: #CFE0FF; overflow-x: auto;
}
.term-body .tl { display: flex; gap: 14px; white-space: pre; }
.term-body .tl .no { flex: none; width: 20px; text-align: right; color: #9B7FB5; user-select: none; }
.term-body .mc-kw { color: #7DD3FC; }
.term-body .typ { color: #9DB8FF; }
.term-body .mc-fn { color: #FBBF24; }
.term-body .mc-num { color: #FFA94D; }
.term-body .str { color: #86EFAC; }
.term-body .mc-cm { color: #A895C0; font-style: italic; }
.term-body .mc-ok { color: var(--ac); }
.term-body .bad { color: var(--wa); }
.term-foot {
  padding: 11px 18px; border-top: 1px solid var(--term-line); background: #3A0B4E;
  font-size: 12.5px; color: #A895C0; display: flex; gap: 18px; flex-wrap: wrap;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}

/* ---------------- 痛点卡 ---------------- */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.pain {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; border-left: 3px solid var(--wa);
}
.pain .tag {
  display: inline-block; font-size: 12px; font-weight: 700; color: var(--wa);
  background: #FBE7E9; border-radius: 5px; padding: 2px 8px; margin-bottom: 11px;
}
.pain h3 { font-size: 16px; color: var(--ink); margin-bottom: 8px; }
.pain p { font-size: 13.6px; color: var(--muted); line-height: 1.7; }

/* ---------------- 评测状态 ---------------- */
.judge-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.jstate {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 14px; text-align: center;
}
.jstate .mc-st {
  display: inline-block; font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 15px; font-weight: 700; letter-spacing: .04em; padding: 5px 12px;
  border-radius: 6px; margin-bottom: 12px;
}
.jstate.ac  .mc-st { background: #E6F7EF; color: #0F7A52; }
.jstate.wa  .mc-st { background: #FBE7E9; color: #C8102E; }
.jstate.tle .mc-st { background: #FFF8E1; color: #A67900; }
.jstate.re  .mc-st { background: #F5EDFA; color: #7A3C94; }
.jstate.mle .mc-st { background: #E9F0FA; color: #2C5490; }
.jstate h3 { font-size: 14px; color: var(--ink); margin-bottom: 6px; }
.jstate p { font-size: 12.8px; color: var(--muted); line-height: 1.65; }

/* ---------------- 算法知识图谱 ---------------- */
.graph { display: flex; flex-direction: column; gap: 10px; }
.gband {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; display: grid; grid-template-columns: 132px 1fr; gap: 20px; align-items: start;
}
.gband .lv {
  font-size: 12px; font-weight: 700; letter-spacing: .08em; color: var(--oi-d);
  margin-bottom: 5px;
}
.gband .lv b { display: block; font-size: 15.5px; color: var(--ink); letter-spacing: 0; margin-top: 3px; }
.gband .gb-desc { font-size: 12.8px; color: var(--muted-2); line-height: 1.6; margin-top: 6px; }
.gb-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.gb-chips span {
  font-size: 12.8px; padding: 5px 11px; border-radius: 7px;
  background: var(--oi-l); color: var(--oi-d); border: 1px solid #E3D8F0;
}
.gband.core { border-color: var(--oi); background: var(--oi-l); }
.gband.core .gb-chips span { background: #fff; }
.garrow { align-self: center; justify-self: start; margin-left: 60px; color: var(--line-2); font-size: 15px; line-height: 1; }

/* ---------------- 环境一致性 ---------------- */
.env-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.env {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 20px; display: flex; gap: 14px; align-items: flex-start;
}
.env .mc-ic {
  flex: none; width: 32px; height: 32px; border-radius: 8px; background: var(--oi-l);
  color: var(--oi-d); display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700;
}
.env h3 { font-size: 15.5px; color: var(--ink); margin-bottom: 6px; }
.env p { font-size: 13.4px; color: var(--muted); line-height: 1.7; }

/* ---------------- 师资（方案 A · 可核验） ---------------- */
.coach-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.coach-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px;
}
.coach-card .role {
  font-size: 12px; font-weight: 700; letter-spacing: .08em; color: var(--oi-d); margin-bottom: 9px;
}
.coach-card h3 { font-size: 17px; color: var(--ink); margin-bottom: 4px; }
.coach-card .edu { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.coach-card .bio { font-size: 13.4px; color: var(--muted); line-height: 1.7; }
.pending-tag {
  display: inline-block; font-size: 12px; font-weight: 700; color: #A67900;
  background: #FFF8E1; border: 1px dashed #D9A93F; border-radius: 5px; padding: 2px 8px;
}
.cut-note {
  margin-top: 20px; background: var(--gold-l); border: 1px solid var(--gold);
  border-radius: var(--radius); padding: 18px 20px;
}
.cut-note h4 { font-size: 14.5px; color: #A67900; margin-bottom: 8px; }
.cut-note p { font-size: 13.4px; color: #5B4A22; line-height: 1.75; }

/* ---------------- OI 提示条 ---------------- */
.oi-note {
  background: var(--oi-l); border: 1px solid #E3D8F0; border-left: 3px solid var(--oi);
  border-radius: var(--radius); padding: 16px 20px; font-size: 13.6px; color: #2F3B6B; line-height: 1.75;
}
.oi-note b { color: var(--oi-d); }

/* ---------------- 键盘规格条 ---------------- */
.kb-spec { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.kb-spec div {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 14px; text-align: center;
}
.kb-spec b { display: block; font-size: 17px; color: var(--ink); margin-bottom: 4px; }
.kb-spec span { font-size: 12.5px; color: var(--muted); }

/* ---------------- 课程体系 ---------------- */
.mc-course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.course {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; display: flex; flex-direction: column; transition: .18s;
}
.course:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.course .cno {
  display: inline-block; font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12.5px; font-weight: 700; letter-spacing: .06em; color: var(--oi-d);
  background: var(--oi-l); border-radius: 5px; padding: 3px 9px; margin-bottom: 12px;
}
.course h3 { font-size: 17px; color: var(--ink); margin-bottom: 6px; }
.course .age { font-size: 12.8px; color: var(--muted-2); margin-bottom: 12px; }
.course p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.course .goal {
  margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--line);
  font-size: 12.8px; color: var(--ink-3); line-height: 1.65;
}
.course .goal b { color: var(--oi-d); font-weight: 700; }
.course.py { border-color: var(--jade); }
.course.py .cno { background: var(--jade-l); color: var(--jade-d); }
.course.py .goal b { color: var(--jade-d); }
.course.top { border-color: var(--gold); background: var(--gold-l); }
.course.top .cno { background: #FFF3D6; color: #A67900; }
.course.top .goal b { color: #A67900; }
/* 低龄段：珊瑚橙 + 更圆润的气质，视觉上先与「竞赛紫」拉开年龄差 */
.course.kid { border-color: var(--kid); background: var(--kid-l); border-radius: 18px; }
.course.kid .cno { background: #FFF0CC; color: var(--kid-d); border-radius: 9px; }
.course.kid .goal { border-top-color: #FFE4B3; }
.course.kid .goal b { color: var(--kid-d); }

/* ---------------- 赛事矩阵 ---------------- */
.mc-contest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.contest {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; display: flex; gap: 14px; align-items: center;
}
.contest .cic {
  flex: none; width: 38px; height: 38px; border-radius: 10px; background: var(--oi-l);
  color: var(--oi-d); font-weight: 700; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
}
.contest.cn .cic { background: #E9EDFB; color: #2C3E8C; }
.contest.intl .cic { background: var(--jade-l); color: var(--jade-d); }
.contest h3 { font-size: 15px; color: var(--ink); margin-bottom: 3px; }
.contest .lv { font-size: 12.5px; color: var(--muted-2); }

/* ---------------- 阶段出口 ---------------- */
.stage .out {
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line);
  font-size: 12.8px; color: var(--ink-3); line-height: 1.6;
}
.stage .out b { color: var(--oi-d); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .mc-hero .split, .split { grid-template-columns: 1fr; gap: 36px; }
  .sub-grid { grid-template-columns: repeat(3, 1fr); }
  .grid-3, .path-row, .fact-grid { grid-template-columns: repeat(2, 1fr); }
  .loop { grid-template-columns: repeat(2, 1fr); }
  .loop-step:nth-child(2) { border-radius: 0 var(--radius) 0 0; border-left: 0; }
  .loop-step:nth-child(3) { border-radius: 0 0 0 var(--radius); border-left: 1px solid var(--line); border-top: 0; }
  .loop-step:nth-child(4) { border-radius: 0 0 var(--radius) 0; border-top: 0; }
  .loop-step:nth-child(2)::after { display: none; }
  .stage-grid, .mc-feature-grid, .scene-grid, .proof-grid, .column-list { grid-template-columns: repeat(2, 1fr); }
  .pain-grid, .judge-grid { grid-template-columns: repeat(3, 1fr); }
  .mc-course-grid, .mc-contest-grid { grid-template-columns: repeat(2, 1fr); }
  .env-grid, .coach-grid, .kb-spec { grid-template-columns: repeat(2, 1fr); }
  .gband { grid-template-columns: 1fr; gap: 12px; }
  .garrow { margin-left: 0; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .hero-title { font-size: 38px; }
  .device, .device-2in1 { max-width: 460px; }
}
@media (max-width: 720px) {
  .mc-container { padding: 0 18px; }
  .mc-nav-links { display: none; }
  .nav-toggle { display: block; }
  .mc-nav.mc-open .mc-nav-links {
    display: flex; flex-direction: column; gap: 2px; position: absolute; top: var(--nav-h);
    left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); padding: 10px 18px 16px;
  }
  .sub-grid, .grid-3, .grid-2, .path-row, .fact-grid, .row2,
  .loop, .stage-grid, .mc-feature-grid, .scene-grid, .proof-grid, .column-list,
  .pain-grid, .judge-grid, .env-grid, .coach-grid, .kb-spec,
  .mc-course-grid, .mc-contest-grid { grid-template-columns: 1fr; }
  .term-body { font-size: 12.4px; }
  .loop-step, .loop-step:first-child, .loop-step:last-child,
  .loop-step:nth-child(2), .loop-step:nth-child(3), .loop-step:nth-child(4) {
    border-radius: var(--radius); border-left: 1px solid var(--line); border-top: 1px solid var(--line);
  }
  .loop-step + .loop-step { border-top: 0; }
  .loop-step::after { display: none; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  section { padding: 60px 0; }
  .sec-title { font-size: 26px; }
  .hero-title { font-size: 32px; }
  .foot-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ============================================================
   品牌色覆盖（对齐 www.xinxixue.tech：蓝为主轴、橙为行动色、金为拔尖）
   放在文件末尾，确保覆盖基础规则
   ============================================================ */
.eyebrow { color: var(--oi-d); }
/* 主 CTA 保持官网橙渐变，不覆盖为蓝 —— 蓝是主轴，橙才是行动色 */
.brand .mark { background: var(--oi); }
.skip-link { background: var(--oi); }
.mc-nav-links a:hover, .mc-nav-links a.mc-active { border-bottom-color: var(--oi); }
.mc-field input:focus, .mc-field select:focus, .mc-field textarea:focus { outline-color: var(--oi); }
.focus-item input:checked + span { background: var(--oi-l); border-color: var(--oi); color: var(--oi-d); }
.badge-row span::before { background: var(--oi); }
.path-step .lv, .stage .yr { color: var(--oi-d); }
.proof .mc-num, .loop-step .step-no, .scene .when { color: var(--gold); }
.column-item .cat { color: var(--oi-d); background: var(--oi-l); }
table.tbl .us { background: var(--oi-l); color: var(--oi-d); }
.feature-list .tick { background: var(--oi-l); color: var(--oi-d); }
section.deep .feature-list .tick { background: rgba(123, 44, 191, .22); color: #C9A8E0; }
section.deep .eyebrow { color: #C9A8E0; }

/* ============================================================
   官网同款组件（对齐 www.xinxixue.tech 的视觉语言）
   公告条 / 渐变标题 / 悬浮服务条 / 服务保障 / 内容更新
   ============================================================ */

/* —— 顶部公告条 —— */
.mc-topbar {
  background: var(--blue-deep); color: #CFE0FF; font-size: 12.8px;
  padding: 7px 0; line-height: 1.5;
}
.mc-topbar .mc-container { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.mc-topbar .tb-tag {
  background: var(--orange); color: #fff; font-weight: 700; font-size: 11.5px;
  padding: 1px 8px; border-radius: 4px; letter-spacing: .02em;
}
.mc-topbar a { color: #FFD58A; text-decoration: underline; text-underline-offset: 2px; }

/* —— Hero 渐变标题（官网 h1 .mc-grad 同款）—— */
.hero-title .mc-grad, .sec-title .mc-grad {
  background: linear-gradient(90deg, var(--purple), var(--brand-red));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.badge-row span {
  background: var(--blue-soft); color: var(--blue-deep);
  border: 1px solid #E3D8F0;
}
.badge-row span::before { background: var(--orange); }

/* —— 悬浮服务条 —— */
.mc-float-bar {
  position: fixed; right: 18px; bottom: 90px; z-index: 70;
  display: flex; flex-direction: column; gap: 10px;
}
.mc-fb {
  width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
  background: #fff; color: var(--blue); font-size: 16px; line-height: 1;
  box-shadow: 0 6px 18px rgba(74, 14, 99, .18);
  display: flex; align-items: center; justify-content: center; transition: .18s;
}
.mc-fb:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(74, 14, 99, .26); }
.mc-fb-top { background: var(--blue); color: #fff; }
@media (max-width: 720px) { .mc-float-bar { right: 12px; bottom: 76px; } .mc-fb { width: 42px; height: 42px; } }

/* —— 服务保障 —— */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.scard {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 22px; display: flex; gap: 14px; align-items: flex-start;
}
.scard .sico {
  flex: none; width: 42px; height: 42px; border-radius: 12px;
  background: var(--blue-soft); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; font-weight: 700;
}
.scard h3 { font-size: 16px; color: var(--ink); margin-bottom: 6px; }
.scard p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.scard .pending {
  display: inline-block; margin-top: 8px; font-size: 11.5px; font-weight: 700;
  color: #A67900; background: #FFF8E1; border: 1px dashed #D9A93F;
  border-radius: 5px; padding: 2px 8px;
}

/* —— 内容更新 —— */
.update-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.ucard {
  background: var(--blue-soft); border: 1px solid #E3D8F0; border-radius: var(--radius);
  padding: 24px 22px;
}
.ucard h3 { font-size: 16px; color: var(--blue-deep); margin-bottom: 8px; }
.ucard p { font-size: 13.8px; color: var(--gray); line-height: 1.75; }
.ucard .ufreq {
  display: inline-block; margin-bottom: 10px; font-size: 12px; font-weight: 700;
  color: var(--blue); background: #fff; border: 1px solid #E3D8F0;
  border-radius: 5px; padding: 2px 9px;
}

@media (max-width: 1024px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .service-grid, .update-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   子网页专属：面包屑、返回官网、顶部条右对齐
   ============================================================ */
.mc-crumbs {
  background: var(--paper); border-bottom: 1px solid var(--line);
  font-size: 12.5px; padding: 9px 0; color: var(--muted-2);
}
.mc-crumbs .mc-container { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.mc-crumbs a { color: var(--purple); }
.mc-crumbs a:hover { color: var(--brand-red); text-decoration: underline; }
.mc-crumbs strong { color: var(--text); font-weight: 700; }
.mc-topbar .tb-back {
  margin-left: auto; color: #FFD58A; font-weight: 700; white-space: nowrap;
  text-decoration: underline; text-underline-offset: 2px;
}
.mc-topbar .tb-back:hover { color: #fff; }
@media (max-width: 720px) { .mc-crumbs { font-size: 12px; } }

/* 课程卡指向官网的交叉链接（消歧用，弱化视觉权重） */
.course .xlink {
  display: inline-block; margin-top: 10px; font-size: 12.5px; font-weight: 700;
  color: var(--purple); text-decoration: none;
}
.course .xlink:hover { color: var(--brand-red); text-decoration: underline; }
.course.kid .xlink { color: var(--kid-d); }
.course.kid .xlink:hover { color: var(--brand-red); }

/* ============================================================
   移动端防横向溢出（≤720px）—— 放在文件末尾确保层叠优先
   ------------------------------------------------------------
   根因：grid 的 `1fr` 轨道，其 min-width 默认是 `auto`，等于「不可小于内容的最小宽度」。
   本页有三处内容的最小宽度压不下去：
     ① 二合一设备的键盘阵列（14 列）
     ② 终端代码行（.term-body .tl 是 white-space:pre，不换行）
     ③ 统计块里的长词组
   结果：390px 视口下文档被撑到 434px，出现横向滚动条。
   修法是把轨道显式写成 minmax(0, 1fr) 让它可以收缩，并给直接子项 min-width:0
   （flex/grid 子项默认 min-width:auto，同样压不下去）。
   不要改成给 body 加 overflow-x:hidden —— 那是把问题藏起来，不是修掉。
   ============================================================ */
@media (max-width: 720px) {
  .mc-container { padding: 0 14px; }
  .split, .mc-hero .split, .grid-2, .grid-3, .row2, .path-row, .fact-grid,
  .sub-grid, .loop, .stage-grid, .mc-feature-grid, .scene-grid, .proof-grid,
  .column-list, .pain-grid, .judge-grid, .env-grid, .coach-grid, .kb-spec,
  .mc-course-grid, .mc-contest-grid, .service-grid, .update-grid, .gband {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split > *, .grid-2 > *, .grid-3 > *, .hero-stats > *, .row2 > *,
  .path-row > *, .loop > *, .mc-feature-grid > *, .mc-course-grid > *,
  .mc-contest-grid > *, .mc-container > *, .term-body > * { min-width: 0; }
  .device, .device-2in1 { max-width: 100%; }
  .badge-row { flex-wrap: wrap; }
  .hero-title { font-size: 30px; }
  .hero-stats .mc-stat b { font-size: 24px; }
  .mc-stat b, .hero-desc, .note { overflow-wrap: anywhere; }
  .term-body { font-size: 11.6px; }
  .term-body .tl { gap: 10px; }
}

/* ---------------- 移动端：悬浮服务条改为底部条 ----------------
   原因：右侧竖排的悬浮球（宽 42 + 距右 12）在 390px 视口下会压住正文——
   正文可用宽度只剩 390-14*2=362，悬浮球正好落在文字上，读起来是断的。
   改成底部常驻横条：不再遮挡正文，转化入口照旧在。
   文案用 ::after 给，桌面端的单字圆形按钮不受影响。 */
@media (max-width: 720px) {
  body { padding-bottom: 64px; }
  .mc-float-bar {
    right: 0; left: 0; bottom: 0; flex-direction: row; flex-wrap: nowrap;
    gap: 8px; justify-content: center; padding: 10px 12px;
    background: rgba(255, 255, 255, .96);
    border-top: 1px solid var(--line);
    box-shadow: 0 -6px 18px rgba(74, 14, 99, .10);
  }
  .mc-fb {
    width: auto; height: 40px; border-radius: 20px; padding: 0 18px;
    font-size: 0; box-shadow: none; background: #fff; border: 1px solid var(--line);
  }
  .mc-fb::after { font-size: 13.5px; font-weight: 700; line-height: 1; }
  .mc-float-bar .mc-fb:nth-child(1)::after { content: "官网首页"; }
  .mc-float-bar .mc-fb:nth-child(2)::after { content: "预约体验"; }
  .mc-float-bar .mc-fb:nth-child(3)::after { content: "回到顶部"; }
  .mc-fb-top { background: var(--purple); color: #fff; border-color: var(--purple); }
  .mc-fb:hover { transform: none; box-shadow: none; }
}

/* ============================================================
   图片轮播 + 宣传视频 + 配置对标（新增）
   ============================================================ */

/* ---- 轮播容器 ---- */
.mc-carousel { position: relative; overflow: hidden; border-radius: 20px;
  background: #0d0612; box-shadow: 0 24px 60px rgba(74, 14, 99, .28); }
.mc-carousel-track { display: flex; transition: transform .55s cubic-bezier(.4,0,.2,1);
  will-change: transform; }
.mc-carousel-slide { min-width: 100%; position: relative; }
.mc-carousel-slide img { display: block; width: 100%; height: auto;
  aspect-ratio: 16/9; object-fit: cover; }
.mc-carousel-cap { position: absolute; left: 0; right: 0; bottom: 0;
  padding: 46px 28px 20px; color: #fff;
  background: linear-gradient(to top, rgba(8,4,12,.86), rgba(8,4,12,0));
  font-size: 16px; font-weight: 600; letter-spacing: .2px; }
.mc-carousel-cap small { display: block; margin-top: 4px; font-size: 12.5px;
  font-weight: 400; opacity: .72; }

.mc-carousel-arrow { position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%; border: none; cursor: pointer;
  background: rgba(255,255,255,.14); color: #fff; font-size: 20px; line-height: 1;
  backdrop-filter: blur(6px); transition: background .2s; z-index: 3; }
.mc-carousel-arrow:hover { background: rgba(255,255,255,.28); }
.mc-carousel-arrow.prev { left: 16px; }
.mc-carousel-arrow.next { right: 16px; }

.mc-carousel-dots { display: flex; gap: 8px; justify-content: center; margin-top: 18px; }
.mc-carousel-dots button { width: 9px; height: 9px; border-radius: 50%; border: none;
  padding: 0; cursor: pointer; background: var(--line-strong, #c9c0d4);
  transition: all .25s; }
.mc-carousel-dots button.on { width: 26px; border-radius: 5px; background: var(--purple, #660874); }

/* ---- 视频容器 ---- */
.mc-video-wrap { position: relative; border-radius: 20px; overflow: hidden;
  box-shadow: 0 24px 60px rgba(74, 14, 99, .28); background: #0d0612;
  aspect-ratio: 16/9; }
.mc-video-wrap video { display: block; width: 100%; height: 100%; object-fit: cover; }
.mc-video-badge { position: absolute; top: 16px; left: 16px; z-index: 2;
  background: rgba(10,5,14,.7); color: #fff; padding: 7px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 600; letter-spacing: .5px; backdrop-filter: blur(6px); }

/* ---- 配置对标卡片 ---- */
.mc-spec-band { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  margin: 22px 0 26px; max-width: 920px; }
.mc-spec-card { border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px;
  background: #fff; }
.mc-spec-card h4 { font-size: 15px; color: var(--muted); font-weight: 600; margin: 0 0 10px; }
.mc-spec-card .ram { font-size: 28px; font-weight: 800; color: var(--purple, #660874);
  letter-spacing: -.5px; }
.mc-spec-card .ram small { font-size: 14px; font-weight: 600; color: var(--muted); }
.mc-spec-card p { font-size: 13px; color: var(--muted); margin: 8px 0 0; line-height: 1.6; }
.mc-spec-card.hero-card { border-color: var(--purple); background:
  linear-gradient(160deg, #fbf5ff, #fff); box-shadow: 0 8px 24px rgba(102,8,116,.12); }
.mc-spec-card.hero-card .ram { color: var(--red, #B01F24); }
.mc-spec-card .tag { display: inline-block; font-size: 11px; font-weight: 700;
  color: #fff; background: var(--purple, #660874); padding: 3px 9px; border-radius: 6px;
  margin-left: 8px; vertical-align: 2px; }
.mc-spec-card .mc-price { font-size: 32px; font-weight: 800; color: var(--red, #B01F24);
  margin: 10px 0 6px; letter-spacing: -.5px; }
.mc-spec-card .mc-price::first-letter { font-size: 20px; }

@media (max-width: 720px) {
  .mc-spec-band { grid-template-columns: 1fr; }
  .mc-carousel-arrow { width: 36px; height: 36px; font-size: 16px; }
  .mc-carousel-cap { font-size: 14px; padding: 36px 18px 14px; }
}

/* ============================================================
   V2 · 融资版双轨高端设计（2026-10 重构）
   新增区块：深色 Hero / 双轨体系 / 国际八赛 / 双师指导 / 市场与愿景
   全部沿用 mc- 前缀体系与品牌紫 #660874 / 品牌红 #B01F24 / 金 #E8A800 色板
   ============================================================ */

/* ---------------- V2 深色 Hero ---------------- */
.v2-hero {
  position: relative;
  padding: 96px 0 88px;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(123, 44, 191, .38), transparent 60%),
    radial-gradient(900px 480px at -10% 110%, rgba(232, 168, 0, .14), transparent 55%),
    linear-gradient(160deg, #2B0A38 0%, #1A0524 52%, #12031A 100%);
  color: #F5EFFA;
  overflow: hidden;
}
.v2-hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px;
  background: linear-gradient(90deg, var(--purple-light), var(--gold), var(--brand-red));
}
.v2-hero-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center;
}
.v2-eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: .16em; font-weight: 700;
  color: var(--gold); text-transform: uppercase; margin-bottom: 16px;
  padding: 6px 14px; border: 1px solid rgba(232, 168, 0, .4); border-radius: 999px;
  background: rgba(232, 168, 0, .08);
}
.v2-hero-title {
  font-size: 46px; line-height: 1.22; letter-spacing: -.01em; color: #fff; margin-bottom: 20px;
}
.v2-gold {
  background: linear-gradient(92deg, #F5C542, var(--gold));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.v2-hero-sub { font-size: 16.5px; line-height: 1.85; color: #D8CBE4; max-width: 560px; margin-bottom: 20px; }
.v2-hero .badge-row span {
  background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .16); color: #EDE4F5;
}
.v2-ghost-light { border-color: rgba(255, 255, 255, .35) !important; color: #fff !important; }
.v2-ghost-light:hover { background: rgba(255, 255, 255, .1); }
.v2-stat b { color: #fff !important; }
.v2-stat span { color: #B8A8C8 !important; }
.v2-kv {
  margin: 0; border-radius: 18px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 24px 64px rgba(0, 0, 0, .45), 0 0 0 6px rgba(255, 255, 255, .04);
}
.v2-kv img { width: 100%; height: auto; display: block; }
.v2-kv-note { margin-top: 12px; text-align: center; font-size: 12.5px; color: #9C8BAE; }

/* ---------------- V2 双轨体系 ---------------- */
.v2-track-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.v2-track {
  border-radius: var(--radius-lg); padding: 30px 30px 26px;
  background: var(--paper); border: 1px solid var(--line);
  box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.v2-track::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px;
  background: linear-gradient(180deg, var(--purple), var(--purple-light));
}
.v2-track.intl::before { background: linear-gradient(180deg, var(--gold), #F5C542); }
.v2-track-badge {
  display: inline-block; font-size: 11.5px; letter-spacing: .12em; font-weight: 700;
  color: var(--purple); background: var(--purple-soft);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}
.v2-track-badge.gold { color: #8A6500; background: var(--gold-l); }
.v2-track-head h3 { font-size: 22px; color: var(--ink); margin-bottom: 8px; }
.v2-track-head p { font-size: 14.5px; color: var(--muted); margin-bottom: 16px; }
.v2-track-flow {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 14px 16px; border-radius: 12px; margin-bottom: 16px;
  background: linear-gradient(120deg, var(--purple-soft), #FBF7FD);
}
.v2-track.intl .v2-track-flow { background: linear-gradient(120deg, var(--gold-l), #FFFDF5); }
.v2-track-flow span {
  font-size: 13px; font-weight: 700; color: var(--purple-deep);
  padding: 5px 11px; background: #fff; border: 1px solid var(--line); border-radius: 8px;
}
.v2-track-flow span.hot { color: #fff; background: var(--brand-red); border-color: var(--brand-red); }
.v2-track-flow i { font-style: normal; color: var(--muted-2); font-size: 13px; }
.v2-track-list li {
  position: relative; padding-left: 22px; font-size: 14px; color: var(--gray);
  line-height: 1.75; margin-bottom: 8px;
}
.v2-track-list li::before {
  content: ""; position: absolute; left: 2px; top: 10px; width: 8px; height: 8px;
  border-radius: 50%; background: var(--purple-light);
}
.v2-track.intl .v2-track-list li::before { background: var(--gold); }

/* ---------------- V2 国际八赛 ---------------- */
.v2-intl { margin-top: 8px; }
.v2-intl-head { margin-bottom: 16px; }
.v2-intl-head h3 { font-size: 20px; color: var(--ink); margin-bottom: 6px; }
.v2-intl-head p { font-size: 13.5px; color: var(--muted); }
.v2-tbl tbody th[scope="row"] { color: var(--purple-deep); font-weight: 800; letter-spacing: .02em; }
.v2-map {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 18px;
}
.v2-map-item {
  background: var(--paper); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; box-shadow: var(--shadow);
}
.v2-map-item b { display: block; font-size: 14px; color: var(--ink); margin-bottom: 4px; }
.v2-map-item span { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ---------------- V2 双师指导（深色） ---------------- */
.v2-mentor {
  background:
    radial-gradient(900px 420px at 90% 0%, rgba(123, 44, 191, .3), transparent 60%),
    linear-gradient(155deg, #2B0A38 0%, #170423 60%, #110318 100%);
  color: #F5EFFA;
}
.v2-mentor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.v2-mentor-card {
  border-radius: var(--radius-lg); padding: 30px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .13);
  backdrop-filter: blur(6px);
}
.v2-mentor-card.gold { border-color: rgba(232, 168, 0, .4); background: rgba(232, 168, 0, .06); }
.v2-mentor-ic {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--purple), var(--purple-light));
}
.v2-mentor-ic.gold { background: linear-gradient(135deg, #B8860B, var(--gold)); }
.v2-mentor-card h3 { font-size: 21px; color: #fff; margin-bottom: 6px; }
.v2-mentor-tag { font-size: 13px; color: var(--gold); font-weight: 700; margin-bottom: 14px; }
.v2-mentor-card ul li {
  position: relative; padding-left: 20px; font-size: 14px; color: #D8CBE4;
  line-height: 1.8; margin-bottom: 6px;
}
.v2-mentor-card ul li::before {
  content: ""; position: absolute; left: 2px; top: 11px; width: 7px; height: 7px;
  border-radius: 50%; background: var(--purple-light);
}
.v2-mentor-card.gold ul li::before { background: var(--gold); }
.v2-mentor-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px;
  padding: 22px 26px; border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .1);
}
.v2-mentor-band b { display: block; font-size: 28px; color: var(--gold); line-height: 1.2; }
.v2-mentor-band span { font-size: 13px; color: #C9B8D9; }

/* ---------------- V2 市场与愿景（深色） ---------------- */
.v2-market {
  background:
    radial-gradient(1000px 460px at 8% 0%, rgba(176, 31, 36, .22), transparent 55%),
    linear-gradient(155deg, #23102E 0%, #150620 55%, #0E0316 100%);
  color: #F5EFFA;
}
.v2-market-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.v2-mkt {
  padding: 24px 22px; border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .12);
}
.v2-mkt b { display: block; font-size: 34px; color: var(--gold); line-height: 1.15; letter-spacing: -.01em; }
.v2-mkt b small { font-size: 15px; font-weight: 700; margin-left: 2px; }
.v2-mkt span { display: block; margin-top: 8px; font-size: 13px; color: #C9B8D9; line-height: 1.6; }
.v2-vision {
  margin-top: 30px; padding: 30px 34px; border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(123, 44, 191, .18), rgba(232, 168, 0, .08));
  border: 1px solid rgba(232, 168, 0, .28);
}
.v2-vision h3 { font-size: 19px; color: var(--gold); margin-bottom: 10px; }
.v2-vision p { font-size: 16px; line-height: 2; color: #EDE4F5; }

/* ---------------- V2 响应式 ---------------- */
@media (max-width: 960px) {
  .v2-hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .v2-hero-title { font-size: 34px; }
  .v2-track-grid, .v2-mentor-grid { grid-template-columns: 1fr; }
  .v2-map { grid-template-columns: 1fr 1fr; }
  .v2-market-grid { grid-template-columns: 1fr 1fr; }
  .v2-mentor-band { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .v2-hero { padding: 64px 0 56px; }
  .v2-hero-title { font-size: 28px; }
  .v2-map, .v2-market-grid, .v2-mentor-band { grid-template-columns: 1fr; }
}

/* V2.1 · 硬件区产品渲染大图 */
.v2-hw-shot {
  margin: 0 0 36px; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 18px 48px rgba(42, 10, 56, .18);
}
.v2-hw-shot img { width: 100%; height: auto; display: block; }
.v2-hw-shot figcaption {
  padding: 12px 18px; font-size: 13px; color: var(--muted);
  background: var(--paper); text-align: center;
}


/* ============================================================
   M · 手机版 m.html 专用样式（2026-10-10）
   mm- 前缀，移动优先，与桌面组件类（v2-/mc-）复用共存
   ============================================================ */

.mm-body { background: var(--bg); color: var(--ink); padding-bottom: 68px; }

/* ---------------- 顶栏 ---------------- */
.mm-topbar {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, .94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.mm-brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 800; font-size: 14px; color: var(--purple-deep); letter-spacing: -.01em;
}
.mm-brand .mark {
  width: 26px; height: 26px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--purple), var(--purple-light));
  color: #fff; font-size: 13px; display: flex; align-items: center; justify-content: center;
}
.mm-toplink {
  flex: none; font-size: 12.5px; font-weight: 700; color: var(--purple);
  border: 1px solid var(--purple); padding: 5px 12px; border-radius: 999px;
}

/* ---------------- Hero ---------------- */
.mm-hero {
  padding: 40px 18px 34px;
  background:
    radial-gradient(600px 300px at 85% -5%, rgba(123, 44, 191, .38), transparent 60%),
    radial-gradient(500px 260px at -10% 105%, rgba(232, 168, 0, .14), transparent 55%),
    linear-gradient(160deg, #2B0A38 0%, #1A0524 52%, #12031A 100%);
  color: #F5EFFA;
}
.mm-hero-title {
  font-size: 30px; line-height: 1.3; letter-spacing: -.01em; color: #fff;
  margin: 14px 0 14px;
}
.mm-hero-sub { font-size: 14px; line-height: 1.85; color: #D8CBE4; margin-bottom: 18px; }
.mm-hero-kv {
  margin: 0 0 18px; border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .45);
}
.mm-hero-kv img { width: 100%; height: auto; display: block; }
.mm-cta-row { display: flex; gap: 12px; margin-bottom: 22px; }
.mm-cta-row .mc-btn { flex: 1; text-align: center; padding: 13px 0; font-size: 14.5px; }
.mm-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
  padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .12);
}
.mm-stat b { display: block; font-size: 24px; color: var(--gold); line-height: 1.2; }
.mm-stat span { font-size: 11px; color: #B8A8C8; }

/* ---------------- 区块通用 ---------------- */
.mm-sec { padding: 40px 18px; }
.mm-sec.tint { background: var(--purple-soft); }
.mm-sec.mm-dark {
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(123, 44, 191, .3), transparent 60%),
    linear-gradient(155deg, #2B0A38 0%, #170423 60%, #110318 100%);
  color: #F5EFFA;
}
.mm-sec-head { margin-bottom: 20px; }
.mm-sec-head h2 { font-size: 22px; color: var(--ink); margin: 8px 0 8px; letter-spacing: -.01em; }
.mm-sec-head p { font-size: 13.5px; color: var(--muted); line-height: 1.75; }
.mm-sec.mm-dark .mm-sec-head p { color: #C9B8D9; }

/* ---------------- 国际八赛紧凑列表 ---------------- */
.mm-intl-list { margin-top: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mm-intl-item {
  background: var(--paper); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 14px; box-shadow: var(--shadow);
}
.mm-intl-item b { display: block; font-size: 14px; color: var(--purple-deep); letter-spacing: .02em; margin-bottom: 3px; }
.mm-intl-item span { font-size: 12px; color: var(--muted); line-height: 1.55; }

/* ---------------- 七阶课程紧凑卡 ---------------- */
.mm-course-list { display: grid; grid-template-columns: 1fr; gap: 10px; }
.mm-course {
  background: var(--paper); border: 1px solid var(--line); border-radius: 12px;
  padding: 13px 16px; box-shadow: var(--shadow);
  border-left: 4px solid var(--purple-light);
}
.mm-course b { font-size: 14px; color: var(--ink); }
.mm-course span { float: right; font-size: 12px; color: var(--purple); font-weight: 700; }
.mm-course p { clear: both; font-size: 12.5px; color: var(--muted); line-height: 1.65; margin-top: 6px; }

/* ---------------- 市场数据 ---------------- */
.mm-mkt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mm-mkt-grid .v2-mkt { padding: 16px 14px; }
.mm-mkt-grid .v2-mkt b { font-size: 24px; }

/* ---------------- FAQ ---------------- */
.mc-faq-list { display: grid; grid-template-columns: 1fr; gap: 10px; }

/* ---------------- 页脚 ---------------- */
.mm-footer { padding: 34px 18px 24px; background: #150620; color: #C9B8D9; }
.mm-footer h4 { font-size: 15px; color: #fff; margin-bottom: 8px; }
.mm-footer p { font-size: 13px; line-height: 1.8; }
.mm-footer a { color: var(--gold); }
.mm-disclaimer {
  margin-top: 16px; padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: 11.5px; line-height: 1.9; color: #8E7CA0;
}

/* ---------------- 吸底 CTA ---------------- */
.mm-cta-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 70;
  display: flex; gap: 10px; padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
  background: rgba(21, 6, 32, .96); backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.mm-cta-ghost {
  flex: 1; text-align: center; padding: 12px 0; border-radius: 10px;
  font-size: 14px; font-weight: 700; color: #EDE4F5;
  border: 1px solid rgba(255, 255, 255, .35);
}
.mm-cta-main {
  flex: 2; text-align: center; padding: 12px 0; border-radius: 10px;
  font-size: 14.5px; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--brand-red), #D43D43);
  box-shadow: 0 6px 18px rgba(176, 31, 36, .4);
}

/* ---------------- 手机版内复用组件微调 ---------------- */
.mm-body .v2-track { padding: 22px 18px 18px; }
.mm-body .v2-track-head h3 { font-size: 18px; }
.mm-body .v2-track-flow { padding: 10px 12px; gap: 6px; }
.mm-body .v2-track-flow span { font-size: 12px; padding: 4px 8px; }
.mm-body .v2-mentor-card { padding: 22px 18px; }
.mm-body .v2-mentor-card h3 { font-size: 18px; }
.mm-body .mc-spec-card .mc-price { font-size: 30px; }
.mm-body .v2-hw-shot { margin-bottom: 20px; }
.mm-body .lead-card { padding: 22px 18px; }
.mm-body .mc-carousel-cap { font-size: 13px; }
.mm-body .mc-carousel-cap small { font-size: 11px; }
.mm-body .mc-carousel-arrow { width: 34px; height: 34px; font-size: 18px; }
.mm-body .eyebrow { font-size: 11px; }

/* M · 吸顶栏锚点补偿 */
.mm-body section[id], .mm-body header[id] { scroll-margin-top: 58px; }