/* ============================================================
   研析科技 × OPC 路演站 v3
   视觉系统对齐 hello.yanxiwang.cn（研析官网）
   ============================================================ */
:root{
  --ink:#11131a;
  --muted:#697080;
  --line:#e8e9ee;
  --paper:#fff;
  --wash:#f6f7fb;
  --wash2:#eef0f8;
  --blue:#5968f2;
  --violet:#8371ee;
  --navy:#111833;
  --deep:#0b1024;
  --deep2:#151c40;
  --deep3:#261f50;
  --green:#2ca66d;
  --max:1380px;
  --shadow:0 26px 80px rgba(25,32,64,.11);
  --soft-shadow:0 14px 40px rgba(28,35,70,.07);
  --grad:linear-gradient(135deg,#3448e9,#8974ee);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);
  font-family:Inter,"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:linear-gradient(180deg,#fff 0%,#fbfbfe 48%,#f5f6fb 100%);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;color:inherit}
::selection{background:rgba(89,104,242,.18)}

.shell{width:min(var(--max),calc(100% - 96px));margin-inline:auto}
@media(max-width:760px){.shell{width:calc(100% - 44px)}}

/* ---------- 背景光斑（官网同款 ambient） ---------- */
.ambient{position:fixed;z-index:-2;border-radius:50%;filter:blur(100px);pointer-events:none;opacity:.35}
.ambient-a{width:420px;height:420px;background:#cbd1ff;top:40px;right:-180px}
.ambient-b{width:360px;height:360px;background:#e0d8ff;left:-180px;top:680px}

/* ---------- 导航 ---------- */
.site-nav{height:78px;position:sticky;top:0;z-index:80;background:rgba(255,255,255,.82);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border-bottom:1px solid rgba(20,25,40,.07)}
.nav-inner{width:min(var(--max),calc(100% - 96px));height:100%;margin:auto;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:30px}
.brand{display:inline-flex;align-items:center;gap:11px;width:max-content}
.brand-mark{width:35px;height:35px;object-fit:contain;display:block;flex-shrink:0}
.brand-copy{display:grid}
.brand-copy strong{font-size:17px;letter-spacing:.02em}
.brand-copy small{font-size:9px;letter-spacing:.22em;color:var(--muted);font-weight:700}
.nav-links{display:flex;gap:26px;justify-content:flex-end}
.nav-links a{font-size:13px;font-weight:650;color:#3c4356;transition:.2s}
.nav-links a:hover{color:var(--blue)}
.nav-actions{display:flex;gap:10px;justify-content:flex-end}
@media(max-width:980px){.nav-links{display:none}}

/* ---------- 按钮 ---------- */
.btn{border:1px solid transparent;border-radius:999px;padding:11px 18px;font-size:12px;font-weight:780;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.2s ease;letter-spacing:.04em}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 12px 28px rgba(79,91,225,.28)}
.btn.primary:hover{transform:translateY(-1px);box-shadow:0 16px 34px rgba(79,91,225,.34)}
.btn.soft{background:#eef0fd;color:#4553d8}
.btn.soft:hover{background:#e3e7fc}
.btn.ghost{background:transparent;border-color:var(--line);color:#3c4356}
.btn.ghost:hover{border-color:#c9cede;background:#fff}
.btn.large{padding:15px 26px;font-size:13px}
.quiet-link{font-size:13px;font-weight:700;color:var(--muted);display:inline-flex;gap:6px;align-items:center;transition:.2s}
.quiet-link:hover{color:var(--blue)}
.quiet-link span{transition:transform .2s}
.quiet-link:hover span{transform:translateX(3px)}

/* ---------- 眉题 ---------- */
.eyebrow{display:flex;align-items:center;gap:9px;font-size:10px;letter-spacing:.18em;color:#69718a;font-weight:830;text-transform:uppercase;margin:0 0 18px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px}

/* ---------- 通用区块 ---------- */
.section{padding:110px 0;position:relative}
@media(max-width:760px){.section{padding:72px 0}}
.section h2{font-size:clamp(34px,3.6vw,54px);line-height:1.12;letter-spacing:-.045em;margin:0 0 22px;font-weight:800}
.section h2 span,.section h2 em{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text;font-style:normal}
.section p{color:#4a5164;font-size:16px;line-height:1.85;margin:0 0 14px;max-width:640px}
.center{text-align:center}
.center p{margin-inline:auto}
.center .eyebrow{justify-content:center}

/* scroll reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Hero ---------- */
.hero{min-height:calc(100vh - 78px);display:flex;align-items:center;padding:70px 0 90px;position:relative}
/* 首屏与全站 .shell 使用同一宽度基准，保证上下页左右对齐 */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;width:min(var(--max),calc(100% - 96px));margin-inline:auto}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr}}
@media(max-width:760px){.hero-grid{width:calc(100% - 44px)}}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;font-size:11px;font-weight:800;letter-spacing:.2em;color:#4553d8;background:#eef0fd;border:1px solid #dfe4fb;padding:8px 16px;border-radius:999px}
.hero h1{font-size:clamp(42px,4.6vw,66px);line-height:1.1;letter-spacing:-.055em;margin:26px 0 24px;font-weight:850;text-wrap:balance}
.hero h1 span{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.hero-sub{font-size:18px;line-height:1.9;color:#4a5164;max-width:560px}
.hero-ctas{display:flex;align-items:center;gap:22px;margin-top:36px;flex-wrap:wrap}
/* Hero 右侧：无外框散落卡片，尺寸按摩擦权重分级 */
.hero-scatter{position:relative;height:100%;min-height:420px;width:100%}
.hs-card{position:absolute;background:rgba(255,255,255,.92);border:1px dashed #c9cede;border-radius:12px;box-shadow:0 8px 24px rgba(17,19,26,.07);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.hs-card b{display:block;font-weight:750;color:var(--ink);margin-bottom:2px;line-height:1.3}
.hs-card small{color:var(--muted);line-height:1.4;display:block}
.hs-card.lg{padding:14px 16px;min-width:148px;max-width:180px}
.hs-card.lg b{font-size:14px}
.hs-card.lg small{font-size:11.5px}
.hs-card.md{padding:11px 13px;min-width:128px;max-width:158px}
.hs-card.md b{font-size:13px}
.hs-card.md small{font-size:11px}
.hs-card.sm{padding:9px 11px;min-width:110px;max-width:140px}
.hs-card.sm b{font-size:12px}
.hs-card.sm small{font-size:10.5px}
.hs-card.xs{padding:7px 10px;min-width:96px;max-width:120px;opacity:.88}
.hs-card.xs b{font-size:11px}
.hs-card.xs small{font-size:10px}
@media(max-width:980px){.hero-scatter{display:none}}

/* ---------- 场景幕（02） ---------- */
.scene{background:var(--wash);border-block:1px solid var(--line)}
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
@media(max-width:980px){.scene-grid{grid-template-columns:1fr}}
.scene .strong-line{font-size:19px;font-weight:750;color:var(--ink);border-left:3px solid var(--blue);padding-left:18px;margin-top:26px}
.step-strip{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:14px;align-items:center;margin-top:64px}
.step-strip .stp{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 20px;box-shadow:var(--soft-shadow)}
.step-strip .stp span{font-size:9px;letter-spacing:.2em;color:var(--muted);font-weight:800;display:block;margin-bottom:8px}
.step-strip .stp b{font-size:16px;letter-spacing:-.01em}
.step-strip i{color:#b9c0d8;font-style:normal;font-size:18px}
@media(max-width:980px){.step-strip{grid-template-columns:1fr;gap:10px}.step-strip i{transform:rotate(90deg);text-align:center}}

/* ---------- 四道槛产品幕 ---------- */
.threshold{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}
@media(max-width:980px){.threshold{grid-template-columns:1fr}}
.threshold .th-num{font-size:clamp(90px,10vw,150px);font-weight:850;letter-spacing:-.05em;line-height:1;color:transparent;-webkit-text-stroke:1.5px #d6dae8;margin-bottom:-10px}
.statement{font-size:19px;font-weight:750;color:var(--ink);border-left:3px solid var(--blue);padding-left:18px;margin-top:24px;line-height:1.7}
.statement b{color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text}
.friction-tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.14em;color:#4553d8;background:#eef0fd;border-radius:999px;padding:6px 14px;margin-bottom:16px}

/* 产品窗口卡 */
.app-window{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}
.app-top{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line);background:#fbfbfe}
.app-top .dots{display:flex;gap:6px}
.app-top .dots i{width:10px;height:10px;border-radius:50%;background:#e3e6ef}
.app-top>span{font-size:12px;font-weight:750;color:#3c4356}
.app-top a{margin-left:auto;font-size:11px;font-weight:800;color:#4553d8;background:#eef0fd;padding:6px 12px;border-radius:999px;transition:.2s}
.app-top a:hover{background:#e0e5fc}
.app-body{padding:28px}
.app-body .wb-small{font-size:9px;letter-spacing:.22em;color:var(--muted);font-weight:800}
.app-body h3{font-size:21px;letter-spacing:-.02em;margin:10px 0 20px;line-height:1.4}
.wb-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.wb-cards>div{background:var(--wash);border:1px solid var(--line);border-radius:14px;padding:16px}
.wb-cards small{font-size:10px;color:var(--muted);font-weight:750;letter-spacing:.1em}
.wb-cards b{display:block;font-size:14px;margin:6px 0 4px}
.wb-cards p{font-size:12px;color:var(--muted);margin:0;line-height:1.6}
@media(max-width:760px){.wb-cards{grid-template-columns:1fr}}
.caption{display:flex;align-items:baseline;gap:12px;margin-top:18px;padding:0 6px}
.caption b{font-size:16px}
.caption span{font-size:13px;color:var(--muted)}

/* Paper 流程 */
.paper-flow{display:flex;align-items:stretch;gap:10px;margin-bottom:22px}
.paper-step{flex:1;background:var(--wash);border:1px solid var(--line);border-radius:14px;padding:14px}
.paper-step span{font-size:10px;font-weight:800;color:#4553d8;letter-spacing:.1em}
.paper-step b{display:block;font-size:14px;margin:6px 0 4px}
.paper-step small{font-size:11px;color:var(--muted);line-height:1.5;display:block}
.paper-flow>i{align-self:center;color:#b9c0d8;font-style:normal}
@media(max-width:760px){.paper-flow{flex-direction:column}.paper-flow>i{transform:rotate(90deg);align-self:center}}
.paper-proofline{display:flex;gap:10px;flex-wrap:wrap}
.paper-proofline span{font-size:11px;font-weight:750;background:#eef7f1;color:#1e7a4c;border:1px solid #cdeeda;padding:6px 12px;border-radius:999px}

/* Skills 经验层 */
.skills-section{background:var(--wash);border-block:1px solid var(--line)}
.layer-diagram{margin-top:56px}
.layer-top{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.layer-top>div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--soft-shadow)}
.layer-top b{font-size:15px;display:block;margin-bottom:6px}
.layer-top small{font-size:12px;color:var(--muted);line-height:1.6}
@media(max-width:760px){.layer-top{grid-template-columns:repeat(2,1fr)}}
.layer-label{margin:26px auto;width:max-content;background:var(--grad);color:#fff;font-weight:800;font-size:14px;letter-spacing:.06em;padding:14px 34px;border-radius:999px;box-shadow:0 14px 34px rgba(79,91,225,.32)}
.layer-arrows{display:flex;justify-content:center;gap:120px;margin:14px 0}
.layer-arrows i{width:1.5px;height:34px;background:linear-gradient(180deg,var(--blue),transparent);position:relative}
.layer-arrows i::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);border:5px solid transparent;border-top-color:var(--blue)}
.layer-products{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:760px;margin:0 auto}
.layer-products>div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;text-align:center}
.layer-products span{font-size:11px;color:var(--muted);font-weight:700;display:block}
.layer-products b{font-size:16px}
@media(max-width:760px){.layer-products{grid-template-columns:1fr}}
.layer-note{margin-top:34px;display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:14px;padding:20px 24px;max-width:860px;margin-inline:auto}
.layer-note b{flex:none;font-size:14px}
.layer-note span{font-size:14px;color:#4a5164;line-height:1.8}
.quote-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:40px}
@media(max-width:980px){.quote-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.quote-grid{grid-template-columns:1fr}}
.quote-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}
.quote-card span{font-size:10px;font-weight:800;letter-spacing:.14em;color:#4553d8;background:#eef0fd;padding:4px 10px;border-radius:999px}
.quote-card p{font-size:14px;line-height:1.75;margin:14px 0 0;color:#3c4356}

/* ---------- Tutor 深蓝幕（全站情绪转折，对齐官网 closing 色） ---------- */
.dark-section{background:linear-gradient(135deg,var(--deep),var(--deep2) 55%,var(--deep3));color:#fff;border-radius:0}
.dark-section .eyebrow{color:#a8b2e8}
.dark-section .eyebrow::before{background:#7d8bf5}
.dark-section h2{color:#fff}
.dark-section h2 span,.dark-section h2 em{background:linear-gradient(135deg,#9fb0ff,#c9b8ff);-webkit-background-clip:text;background-clip:text}
.dark-section p{color:#b9c1dd}
.q-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:44px 0}
@media(max-width:980px){.q-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.q-grid{grid-template-columns:1fr}}
.q-grid>div{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:22px;font-size:15px;font-weight:650;line-height:1.7;color:#dfe4ff}
.tutor-services{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:36px}
@media(max-width:980px){.tutor-services{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.tutor-services{grid-template-columns:1fr}}
.tutor-services>div{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:20px}
.tutor-services b{display:block;font-size:15px;margin-bottom:6px;color:#fff}
.tutor-services span{font-size:13px;color:#a8b2e8}
.honest-note{margin-top:40px;border-left:3px solid #7d8bf5;padding-left:18px}
.honest-note p{color:#c9cfec;font-size:15px}
.ibt-cite{margin-top:28px;font-size:12px;line-height:1.7;color:#8b95b8;max-width:720px}

/* ---------- 系统幕（07 连成链） ---------- */
.system-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:54px}
@media(max-width:980px){.system-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.system-grid{grid-template-columns:1fr}}
.sys-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--soft-shadow);transition:.25s}
.sys-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.sys-card .sys-num{font-size:11px;font-weight:800;color:#4553d8;letter-spacing:.14em}
.sys-card small{display:block;font-size:10px;letter-spacing:.18em;color:var(--muted);font-weight:800;margin:14px 0 6px}
.sys-card h3{font-size:20px;margin:0 0 10px;letter-spacing:-.02em}
.sys-card p{font-size:13px;line-height:1.75;color:#4a5164;margin:0}
.loop-band{margin-top:56px;background:var(--grad);border-radius:26px;padding:44px;color:#fff;text-align:center;box-shadow:0 24px 60px rgba(79,91,225,.3)}
.loop-band small{font-size:10px;letter-spacing:.24em;font-weight:800;opacity:.85}
.loop-band strong{display:block;font-size:clamp(22px,2.6vw,34px);letter-spacing:-.02em;margin:14px 0 8px}
.loop-band span{font-size:14px;opacity:.9}
.through-case{margin-top:22px;background:#fff;border:1px solid var(--line);border-left:3px solid var(--green);border-radius:16px;padding:24px 28px}
.through-case b{font-size:15px;display:block;margin-bottom:8px}
.through-case p{font-size:14px;color:#4a5164;margin:0;line-height:1.85;max-width:none}
.disclaimer{margin-top:18px;font-size:12.5px;color:var(--muted);display:flex;gap:10px;align-items:flex-start}
.disclaimer b{flex:none;color:#3c4356}

/* ---------- 趋势 / 壁垒 ---------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
@media(max-width:980px){.two-col{grid-template-columns:1fr}}
.big-claim{font-size:clamp(26px,3vw,40px);font-weight:800;letter-spacing:-.03em;line-height:1.35}
.moat-list{display:grid;gap:14px}
.moat-item{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 22px}
.moat-item .mk{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex:none;font-size:15px}
.moat-item .mk.no{background:#fdeeee;color:#c04545}
.moat-item .mk.yes{background:#e9f7ef;color:#1e7a4c}
.moat-item b{display:block;font-size:15px;margin-bottom:4px}
.moat-item p{font-size:13px;color:var(--muted);margin:0;line-height:1.7}

/* ---------- 市场 ---------- */
.market-section{background:var(--wash);border-block:1px solid var(--line)}
.market-formula{display:flex;align-items:stretch;gap:12px;margin-top:48px;flex-wrap:wrap}
.mk-box{flex:1;min-width:200px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--soft-shadow)}
.mk-box small{font-size:10px;letter-spacing:.16em;color:var(--muted);font-weight:800;display:block;margin-bottom:10px}
.mk-box b{font-size:17px;line-height:1.5;display:block}
.mk-op{align-self:center;font-size:22px;font-weight:800;color:#4553d8}
.market-note{margin-top:30px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:760px){.market-note{grid-template-columns:1fr}}
.market-note>div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}
.market-note b{display:block;font-size:14px;margin-bottom:8px}
.market-note p{font-size:13px;color:#4a5164;margin:0;line-height:1.8}
.market-note .no-trillion{border-left:3px solid #c04545}
.market-note .real-calc{border-left:3px solid var(--green)}

/* ---------- 证据板 ---------- */
.proof-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:52px}
.proof-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--soft-shadow)}
.proof-card .pt{font-size:11px;font-weight:800;letter-spacing:.12em;color:#4553d8;display:flex;align-items:center;gap:8px}
.proof-card .pt::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}
.proof-card p{font-size:14px;line-height:1.8;color:#3c4356;margin:12px 0 0}
.three-things{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:40px}
@media(max-width:760px){.three-things{grid-template-columns:1fr}}
.three-things>div{text-align:center;background:var(--grad);color:#fff;border-radius:20px;padding:34px 22px;box-shadow:0 18px 44px rgba(79,91,225,.26)}
.three-things b{font-size:20px;display:block;letter-spacing:-.01em}
.three-things span{font-size:13px;opacity:.88;display:block;margin-top:8px}

/* ---------- Demo 沙盘 ---------- */
.demos-section{background:var(--navy);color:#fff}
.demos-section .eyebrow{color:#a8b2e8}
.demos-section .eyebrow::before{background:#7d8bf5}
.demos-section h2{color:#fff}
.demos-section .section-sub{color:#a8b2e8}
.demo-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:40px 0 24px}
.demo-tab{border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);color:#c9cfec;border-radius:999px;padding:11px 20px;font-size:13px;font-weight:750;display:inline-flex;gap:10px;align-items:center;transition:.2s}
.demo-tab span{font-size:10px;opacity:.7;font-weight:800}
.demo-tab:hover{background:rgba(255,255,255,.1)}
.demo-tab.active{background:#fff;color:var(--navy);border-color:#fff}
.demo-stage{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:24px;overflow:hidden}
.demo-frame-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid rgba(255,255,255,.1)}
.demo-frame-head .dots{display:flex;gap:6px}
.demo-frame-head .dots i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.2)}
.demo-frame-head span{font-size:12px;font-weight:700;color:#c9cfec}
.demo-frame-head a{margin-left:auto;font-size:11px;font-weight:800;color:#fff;background:var(--grad);padding:7px 14px;border-radius:999px}
.demo-iframe-wrap{position:relative;height:560px;background:#fff}
.demo-iframe-wrap iframe{width:100%;height:100%;border:0;display:block}
.demo-meta{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;padding:20px 24px}
@media(max-width:760px){.demo-meta{grid-template-columns:1fr}}
.demo-meta .dm-role{font-size:10px;letter-spacing:.18em;color:#8f9bd8;font-weight:800}
.demo-meta h3{margin:8px 0 6px;font-size:20px;color:#fff}
.demo-meta p{margin:0;font-size:13px;color:#a8b2e8;line-height:1.7;max-width:560px}
.demo-meta .dm-actions{display:flex;gap:10px;flex-wrap:wrap}
.demo-proofline{padding:16px 24px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;color:#c9cfec;display:flex;gap:10px;align-items:center}
.demo-proofline::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);flex:none}
.demo-assets{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.demo-assets a{font-size:11.5px;font-weight:750;color:#dfe4ff;border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:8px 14px;transition:.2s}
.demo-assets a:hover{background:rgba(255,255,255,.1)}

/* ---------- 远景 / 为什么是我们 / OPC ---------- */
.horizon-big{font-size:clamp(24px,2.8vw,38px);font-weight:800;letter-spacing:-.03em;line-height:1.4;color:var(--ink);max-width:820px}
.horizon-steps{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:36px 0}
.horizon-steps span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:12px 22px;font-weight:750;font-size:15px;box-shadow:var(--soft-shadow)}
.horizon-steps i{color:#b9c0d8;font-style:normal}
.horizon-boundary{border-left:3px solid var(--blue);padding-left:20px;max-width:640px}
.horizon-boundary strong{display:block;font-size:17px;margin-top:8px;line-height:1.7}
.whyus-list{display:grid;gap:12px;margin-top:36px}
.whyus-item{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 22px}
.whyus-item .wp{flex:none;font-size:11px;font-weight:800;color:#4553d8;background:#eef0fd;border-radius:999px;padding:6px 14px;min-width:118px;text-align:center}
.whyus-item p{margin:0;font-size:14px;color:#3c4356;line-height:1.7}
.opc-compare{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:stretch;margin-top:48px}
@media(max-width:760px){.opc-compare{grid-template-columns:1fr}}
.opc-compare>div{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:var(--soft-shadow)}
.opc-compare small{font-size:10px;letter-spacing:.18em;color:var(--muted);font-weight:800;display:block;margin-bottom:12px}
.opc-compare strong{font-size:19px;line-height:1.6;letter-spacing:-.01em}
.opc-compare .equal{align-self:center;font-size:30px;font-weight:800;color:#4553d8}
.opc-bottom{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}
@media(max-width:760px){.opc-bottom{grid-template-columns:1fr}}
.opc-bottom>div{background:var(--wash);border:1px solid var(--line);border-radius:16px;padding:22px}
.opc-bottom b{display:block;font-size:14px;margin-bottom:8px}
.opc-bottom span{font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- 结尾 ---------- */
.closing{background:linear-gradient(135deg,var(--deep),var(--deep2) 55%,var(--deep3));color:#fff;text-align:center}
.closing .eyebrow{justify-content:center;color:#a8b2e8}
.closing .eyebrow::before{background:#7d8bf5}
.closing h2{color:#fff;font-size:clamp(36px,4.4vw,62px)}
.closing p{color:#b9c1dd;margin-inline:auto}
.answer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;max-width:960px;margin:44px auto}
@media(max-width:760px){.answer-grid{grid-template-columns:repeat(2,1fr)}}
.answer-grid span{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:18px;font-size:14px;font-weight:650;color:#dfe4ff}
.final-line{font-size:clamp(20px,2.4vw,30px);font-weight:800;color:#fff;margin:40px 0 10px;letter-spacing:-.02em}
.final-keys{font-size:13px;letter-spacing:.3em;color:#8f9bd8;font-weight:800;margin-bottom:44px}
.final-actions{display:flex;gap:18px;justify-content:center;align-items:center;flex-wrap:wrap}
.closing .quiet-link{color:#a8b2e8}
.closing .quiet-link:hover{color:#fff}

/* ---------- 页脚 ---------- */
.footer{padding:44px 0;border-top:1px solid var(--line);background:#fff}
.footer .shell{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.footer b{font-size:13px;display:block}
.footer span{font-size:11px;color:var(--muted)}
.footer a{font-size:12px;font-weight:700;color:var(--muted)}
.footer a:hover{color:var(--blue)}

/* ---------- 3 MIN 路演模式 ---------- */
.pitch-controls{position:fixed;left:50%;bottom:26px;transform:translate(-50%,120px);z-index:120;background:rgba(17,19,26,.92);backdrop-filter:blur(14px);color:#fff;border-radius:999px;padding:10px 12px 10px 22px;display:flex;align-items:center;gap:18px;box-shadow:0 20px 50px rgba(0,0,0,.35);transition:transform .35s ease;max-width:calc(100% - 40px)}
.pitch-controls.on{transform:translate(-50%,0)}
.pitch-progress{position:absolute;left:18px;right:18px;top:-3px;height:3px;background:rgba(255,255,255,.15);border-radius:3px;overflow:hidden}
.pitch-progress i{display:block;height:100%;width:0;background:var(--grad);border-radius:3px;transition:width .3s}
.pitch-meta{display:flex;gap:12px;align-items:center;min-width:0}
.pitch-meta span{font-size:11px;font-weight:800;color:#9fb0ff;flex:none}
.pitch-meta b{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:320px}
.pitch-actions{display:flex;gap:6px;flex:none}
.pitch-actions button{border:1px solid rgba(255,255,255,.2);background:transparent;color:#fff;border-radius:999px;padding:8px 14px;font-size:12px;font-weight:700;transition:.2s}
.pitch-actions button:hover{background:rgba(255,255,255,.12)}
body.pitching .pitch-step{transition:opacity .4s}
body.pitching .pitch-step:not(.pitch-active){opacity:.12}

/* ---------- 录屏弹窗 ---------- */
.video-modal{position:fixed;inset:0;z-index:200;background:rgba(11,16,36,.82);backdrop-filter:blur(10px);display:none;align-items:center;justify-content:center;padding:30px}
.video-modal.on{display:flex}
.video-box{width:min(960px,100%);background:#fff;border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.video-box video{width:100%;display:block;background:#000}
.video-empty{padding:80px 30px;text-align:center}
.video-empty small{font-size:10px;letter-spacing:.22em;color:var(--muted);font-weight:800}
.video-empty h3{margin:14px 0 8px;font-size:22px}
.video-empty p{color:var(--muted);font-size:13px;margin:0 auto;max-width:none}
.video-close{position:absolute;top:24px;right:28px;width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:transparent;color:#fff;font-size:20px}

/* ========== v4 enrichment ========== */
.scatter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}
@media(max-width:980px){.scatter-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.scatter-grid{grid-template-columns:1fr}}
.scatter-card{background:#fff;border:1px dashed #c9cede;border-radius:14px;padding:16px 18px;position:relative}
.scatter-card::after{content:"散落";position:absolute;top:10px;right:12px;font-size:9px;font-weight:800;letter-spacing:.08em;color:#c04545;background:#fdeeee;padding:2px 8px;border-radius:999px}
.scatter-card b{display:block;font-size:14px;margin-bottom:4px}
.scatter-card span{font-size:12px;color:var(--muted);line-height:1.55}
.scatter-arrow{text-align:center;margin:22px 0 8px;font-size:12px;font-weight:800;letter-spacing:.14em;color:#4553d8}
.unify-band{background:#eef0fd;border:1px solid #dfe4fb;border-radius:16px;padding:18px 22px;display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.unify-band b{font-size:14px;color:#4553d8}
.unify-band span{font-size:13px;color:#4a5164}

.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:28px}
@media(max-width:980px){.pain-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.pain-grid{grid-template-columns:1fr}}
.pain-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;display:flex;gap:12px;align-items:flex-start}
.pain-card .pn{width:28px;height:28px;border-radius:8px;background:#fdeeee;color:#c04545;display:grid;place-items:center;font-size:12px;font-weight:800;flex:none}
.pain-card b{display:block;font-size:14px;margin-bottom:2px}
.pain-card span{font-size:12px;color:var(--muted);line-height:1.55}

.case-hero{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden;margin-top:40px}
.case-hero-top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 24px;border-bottom:1px solid var(--line);background:#fbfbfe;flex-wrap:wrap}
.case-hero-top .ch-tag{font-size:10px;font-weight:800;letter-spacing:.16em;color:#1e7a4c;background:#e9f7ef;border:1px solid #cdeeda;padding:5px 12px;border-radius:999px}
.case-hero-body{padding:28px 28px 24px}
.case-chain{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap;margin:20px 0}
.case-chain .cc{flex:1;min-width:120px;background:var(--wash);border:1px solid var(--line);border-radius:12px;padding:14px}
.case-chain .cc small{font-size:10px;font-weight:800;letter-spacing:.1em;color:#4553d8;display:block}
.case-chain .cc b{font-size:13px;display:block;margin-top:6px}
.case-chain .cc span{font-size:11px;color:var(--muted);display:block;margin-top:4px;line-height:1.5}
.case-scores{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.case-scores span{font-size:12px;font-weight:750;background:#eef7f1;color:#1e7a4c;border:1px solid #cdeeda;padding:7px 14px;border-radius:999px}
.case-disclaimer{margin-top:14px;font-size:12.5px;color:var(--muted);line-height:1.7;border-left:3px solid #c9cede;padding-left:14px}
.case-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.case-links a{font-size:12px;font-weight:750;color:#4553d8;background:#eef0fd;padding:8px 14px;border-radius:999px}

.market-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:40px}
@media(max-width:900px){.market-stats{grid-template-columns:1fr}}
.ms-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--soft-shadow)}
.ms-card .ms-label{font-size:10px;letter-spacing:.16em;color:var(--muted);font-weight:800}
.ms-card .ms-num{font-size:clamp(28px,3vw,40px);font-weight:850;letter-spacing:-.03em;margin:10px 0 6px;color:var(--ink)}
.ms-card .ms-unit{font-size:13px;color:#4553d8;font-weight:700}
.ms-card .ms-desc{font-size:13px;color:#4a5164;line-height:1.7;margin-top:10px}
.ms-card .ms-src{font-size:11px;color:var(--muted);margin-top:12px;line-height:1.6;border-top:1px solid var(--line);padding-top:10px}
.market-calc-box{margin-top:28px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--soft-shadow)}
.market-calc-box h3{font-size:16px;margin:0 0 16px}
.calc-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.calc-pill{background:var(--wash);border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:13px}
.calc-pill b{display:block;font-size:15px;margin-top:2px}
.calc-op{font-size:18px;font-weight:800;color:#4553d8}
.market-sources{margin-top:22px;background:var(--wash);border-radius:14px;padding:18px 22px}
.market-sources b{display:block;font-size:12px;margin-bottom:8px;color:#3c4356}
.market-sources ol{margin:0;padding-left:18px}
.market-sources li{font-size:12px;color:var(--muted);line-height:1.75;margin-bottom:4px}
.market-sources a{color:#4553d8;font-weight:650}

.threshold-full{display:block}
.threshold-full .th-intro{max-width:720px;margin-bottom:8px}
.threshold-full .th-product{margin-top:40px}
.rich-block{margin-top:36px}

.skill-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:10px;align-items:center;margin-top:28px}
@media(max-width:900px){.skill-flow{grid-template-columns:1fr}.skill-flow>i{transform:rotate(90deg);justify-self:center}}
.skill-flow .sf{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;text-align:center}
.skill-flow .sf small{font-size:10px;letter-spacing:.12em;color:var(--muted);font-weight:800}
.skill-flow .sf b{display:block;font-size:15px;margin-top:8px}
.skill-flow>i{color:#b9c0d8;font-style:normal;font-size:18px}

/* 已发表研究列表 */
.pub-block{margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.pub-label{font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--muted);margin:0 0 18px}
.pub-list{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.pub-list li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.pub-list b{display:block;font-size:14px;color:var(--ink);margin-bottom:6px}
.pub-list span{display:block;font-size:12.5px;line-height:1.7;color:#4a5164}
.pub-list em{display:block;margin-top:8px;font-size:12px;font-style:normal;color:#4553d8;font-weight:650}

.calc-result{background:linear-gradient(135deg,#eef1ff,#f4edff);border-color:#c5ccef}
.calc-result b{color:#3a45c7}
.calc-row{flex-wrap:wrap}

.demo-head-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.demo-refresh{font-size:11px;font-weight:800;color:#c9cfec;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);padding:7px 14px;border-radius:999px;cursor:pointer}
.demo-refresh:hover{background:rgba(255,255,255,.14);color:#fff}
.demo-frame-head a{margin-left:0}