:root{
  --cream : #F7F4EF;
  --sand  : #EDE9E2;
  --ink   : #0D0F1A;
  --ink2  : #2A2D3E;
  --muted : #8A8FA8;
  --lime  : #C2FF4A;   /* 主强调 */
  --coral : #FF4D2E;   /* 次强调 */
  --cobalt: #1B4BFF;   /* 第三强调 */
  --amber : #FFB020;
  --r     : 12px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--cream);color:var(--ink);font-family:'Plus Jakarta Sans','Noto Sans SC',sans-serif;overflow-x:hidden;font-size:15px}
::-webkit-scrollbar{width:3px}::-webkit-scrollbar-thumb{background:var(--ink)}

/* ══ 工具 ══ */
.wrap{max-width:1280px;margin:0 auto;padding:0 48px}
.sec{padding:110px 0}
/* 入场 */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .75s ease,transform .75s ease}
.reveal.in{opacity:1;transform:none}

/* ══════════════ NAV ══════════════ */
#nav{position:fixed;inset:0 0 auto;height:64px;z-index:300;display:flex;align-items:center;padding:0 48px;justify-content:space-between;transition:.35s}
#nav.solid{background:rgb(143 143 143 / 70%);backdrop-filter:blur(12px);}
.logo{font-family:'DM Serif Display',serif;font-size:26px;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px;letter-spacing:-.01em}
.logo-dot{width:10px;height:10px;background:var(--lime);border-radius:50%;border:2px solid var(--ink);flex-shrink:0}
.nav-links{display:flex;gap:36px;list-style:none}
.nav-links a{color:#fff;text-decoration:none;font-size:14px;font-weight:500;transition:.25s;letter-spacing:.01em}
.nav-links a:hover{color:var(--cobalt)}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;background:var(--ink);color:#fff;font-size:13px;font-weight:600;border-radius:100px;text-decoration:none;transition:.3s;letter-spacing:.02em}
.nav-cta:hover{background:var(--cobalt);transform:translateY(-1px)}

/* ══════════════ HERO ══════════════ */
#hero{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:#bed1ff;position:relative;overflow:hidden}

/* 左：大标题区 */
.hero-l{display:flex;flex-direction:column;justify-content:center;padding:120px 64px 80px 48px;position:relative;z-index:2}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:var(--lime);border-radius:100px;font-size:11px;font-weight:700;letter-spacing:.15em;color:var(--ink);margin-bottom:32px;width:fit-content}
.hero-eyebrow .pulse{width:6px;height:6px;background:var(--ink);border-radius:50%;animation:pop .9s ease-in-out infinite alternate}
@keyframes pop{to{transform:scale(1.5)}}
.hero-l h1{font-family:'DM Serif Display',serif;font-size:clamp(42px,5.5vw,76px);line-height:1.05;letter-spacing:-.03em;color:var(--ink)}
.hero-l h1 em{font-style:italic;color:var(--cobalt)}
.hero-l h1 .stroke{-webkit-text-stroke:2px var(--ink);color:transparent}
.hero-desc{font-size:16px;color:var(--muted);line-height:1.85;max-width:420px;margin:28px 0 40px;font-weight:400}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn-ink{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;background:var(--ink);color:#fff;font-size:14px;font-weight:700;border-radius:100px;text-decoration:none;transition:.3s;letter-spacing:.02em}
.btn-ink:hover{background:var(--cobalt);transform:translateY(-2px);box-shadow:0 10px 32px rgba(27,75,255,.3)}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;background:transparent;border:2px solid var(--ink);color:var(--ink);font-size:14px;font-weight:600;border-radius:100px;text-decoration:none;transition:.3s}
.btn-outline:hover{background:var(--ink);color:#fff}
.hero-nums{display:flex;gap:40px;margin-top:56px;padding-top:40px;border-top:1px solid var(--sand)}
.hn-num{font-family:'DM Serif Display',serif;font-size:34px;color:var(--ink);line-height:1}
.hn-label{font-size:12px;color:var(--muted);margin-top:4px;font-weight:500;letter-spacing:.04em}

/* 右：视觉拼贴 */
.hero-r{position:relative;overflow:hidden}
/* 分割色块 */
.hero-r-bg{position:absolute;inset:0;background:var(--ink)}
/* 彩色角标 */
.hero-accent-block{position:absolute;top:0;right:0;width:50%;height:35%;background:var(--lime)}
.hero-accent-block2{position:absolute;bottom:0;left:0;width:40%;height:25%;background:var(--cobalt);opacity:.7}
/* 主卡片 */
.hero-card-main{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:340px;background:var(--cream);border-radius:20px;overflow:hidden;box-shadow:0 32px 80px rgba(0,0,0,.5)}
.hcm-top{height:180px;position:relative;overflow:hidden;background:linear-gradient(135deg,#0d1a3e,#1a1040)}
.hcm-top::before{content:'';position:absolute;inset:0;background:repeating-linear-gradient(45deg,transparent,transparent 16px,rgba(194,255,74,.06) 16px,rgba(194,255,74,.06) 17px)}
.hcm-code{position:absolute;inset:16px;background:rgba(0,0,0,.55);border-radius:10px;border:1px solid rgba(194,255,74,.2);padding:14px 16px;font-family:'JetBrains Mono',monospace;font-size:11px;line-height:2;color:rgba(255,255,255,.5)}
.hcm-code .k{color:#C2FF4A}.hcm-code .f{color:#5B9BFF}.hcm-code .s{color:#FF8C5A}.hcm-code .c{color:rgba(255,255,255,.25)}
.hcm-body{padding:22px 22px 26px}
.hcm-badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;background:rgba(194,255,74,.15);border:1px solid rgba(194,255,74,.4);border-radius:100px;font-size:10px;font-weight:700;color:#5a8a00;margin-bottom:12px;letter-spacing:.08em}
.hcm-badge-dot{width:5px;height:5px;background:#7ab800;border-radius:50%;animation:pop .8s infinite alternate}
.hcm-body h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px;line-height:1.3}
.hcm-body p{font-size:12px;color:var(--muted);line-height:1.7}
/* 小浮卡 */
.hero-pip{position:absolute;background:white;border-radius:12px;padding:12px 16px;box-shadow:0 8px 32px rgba(0,0,0,.25);display:flex;align-items:center;gap:12px;font-size:12px;font-weight:600;color:var(--ink);white-space:nowrap}
.pip1{bottom:80px;right:16px;animation:float 3.5s ease-in-out infinite}
.pip2{top:90px;left:16px;animation:float 3.5s ease-in-out infinite .6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.pip-icon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:15px}

/* ══════════════ SERVICES ══════════════ */
#services{background:#fff;padding-bottom:0}
#services .wrap{padding-bottom:0}
/* 顶部标题行 */
.srv-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:72px}
.srv-header-l .eyebrow{font-size:11px;letter-spacing:.2em;font-weight:700;color:var(--cobalt);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.srv-header-l .eyebrow::before{content:'';width:20px;height:2px;background:var(--cobalt)}
.srv-header-l h2{font-family:'DM Serif Display',serif;font-size:clamp(30px,4vw,52px);line-height:1.1;letter-spacing:-.02em}
.srv-header-l h2 span{color:var(--coral)}
.srv-header-r{max-width:320px;text-align:right}
.srv-header-r p{font-size:14px;color:var(--muted);line-height:1.9}

/* 服务卡网格：3列 */
.srv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--sand)}
/* 大卡：第一张横跨全宽 */
.srv-featured{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;min-height:460px;border-bottom:1px solid var(--sand);overflow:hidden}
.sf-left{padding:56px 56px;display:flex;flex-direction:column;justify-content:space-between;border-right:1px solid var(--sand);background:var(--ink);color:#fff}
.sf-num{font-family:'DM Serif Display',serif;font-size:80px;line-height:1;color:var(--lime);opacity:.4;margin-bottom:auto}
.sf-body{margin-top:32px}
.sf-tag{display:inline-block;padding:4px 12px;background:rgba(194,255,74,.15);border:1px solid rgba(194,255,74,.3);border-radius:100px;font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--lime);margin-bottom:16px}
.sf-body h3{font-family:'DM Serif Display',serif;font-size:36px;line-height:1.2;letter-spacing:-.01em;margin-bottom:16px}
.sf-body p{font-size:14px;color:rgba(255,255,255,.55);line-height:1.9;max-width:380px;margin-bottom:28px}
.sf-chips{display:flex;flex-wrap:wrap;gap:8px}
.sf-chips span{padding:5px 13px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:100px;font-size:11px;color:rgba(255,255,255,.6);transition:.3s}
.sf-more{display:inline-flex;align-items:center;gap:8px;margin-top:28px;font-size:13px;font-weight:700;color:var(--lime);transition:.3s;text-decoration:none}
.sf-arr{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--lime);color:var(--ink);font-size:13px;transition:.3s}
.sf-more:hover .sf-arr{transform:translateX(4px)}

/* 右侧视觉 */
.sf-right{position:relative;overflow:hidden;background:var(--sand);display:flex;align-items:center;justify-content:center}
.sf-right::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(194,255,74,.12),transparent 60%)}
/* Python 终端插画 */
.art-terminal{background:var(--ink);border-radius:14px;width:340px;overflow:hidden;box-shadow:0 24px 64px rgba(0,0,0,.15)}
.at-bar{background:#1a1d2e;padding:12px 16px;display:flex;align-items:center;gap:6px}
.at-dot{width:10px;height:10px;border-radius:50%}
.at-r{background:#ff5f57}.at-y{background:#febc2e}.at-g{background:#28c840}
.at-title{margin:0 auto;font-size:11px;color:rgba(255,255,255,.3);font-family:'JetBrains Mono',monospace}
.at-body{padding:20px;font-family:'JetBrains Mono',monospace;font-size:12px;line-height:2}
.at-body .k{color:#C2FF4A}.at-body .f{color:#82b4ff}.at-body .s{color:#ffb77c}.at-body .c{color:rgba(255,255,255,.28)}.at-body .v{color:#ff9fd4}
.at-cursor::after{content:'▋';animation:blink .7s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* 普通服务卡 */
.srv-card{border-right:1px solid var(--sand);border-bottom:1px solid var(--sand);padding:0;overflow:hidden;display:flex;flex-direction:column;transition:.4s;position:relative;cursor:default;background:#fff}
.srv-card:nth-child(3n){border-right:none}
.srv-card:hover{background:var(--cream)}
/* 顶部图示区 */
.sc-vis{height:200px;position:relative;overflow:hidden;flex-shrink:0;display:flex;align-items:center;justify-content:center}
/* 各卡配色背景 */
.sc-v-cobalt{background:linear-gradient(145deg,#EEF2FF,#DAE4FF)}
.sc-v-coral{background:linear-gradient(145deg,#FFF1EE,#FFD8D0)}
.sc-v-mint{background:linear-gradient(145deg,#EDFAF3,#C8F5DF)}
.sc-v-amber{background:linear-gradient(145deg,#FFFBEA,#FFE9A0)}
.sc-v-ink{background:linear-gradient(145deg,#F0F1F5,#E2E4EC)}
/* 装饰网格 */
.sc-vis .grid-o{position:absolute;inset:0;background-image:linear-gradient(rgba(0,0,0,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,.04) 1px,transparent 1px);background-size:20px 20px}
.sc-body{padding:28px 28px 32px;flex:1;display:flex;flex-direction:column}
.sc-tag{display:inline-block;padding:4px 11px;border-radius:100px;font-size:10px;font-weight:700;letter-spacing:.12em;margin-bottom:12px}
.t-cobalt{background:rgba(27,75,255,.1);color:var(--cobalt)}
.t-coral{background:rgba(255,77,46,.1);color:var(--coral)}
.t-mint{background:rgba(28,180,90,.1);color:#1c8a40}
.t-amber{background:rgba(255,176,32,.15);color:#8a5a00}
.t-ink{background:rgba(13,15,26,.08);color:var(--ink2)}
.sc-num{position:absolute;top:14px;left:20px;font-family:'DM Serif Display',serif;font-size:16px;font-weight:400;opacity:.4;color:var(--ink)}
.sc-body h3{font-family:'DM Serif Display',serif;font-size:22px;line-height:1.25;letter-spacing:-.01em;margin-bottom:10px}
.sc-body .sum{font-size:13px;color:var(--muted);line-height:1.9;flex:1}
.sc-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px}
.sc-chips span{padding:4px 11px;background:var(--sand);border-radius:100px;font-size:11px;color:var(--ink2);font-weight:500;transition:.3s}
.srv-card:hover .sc-chips span{background:var(--ink);color:#fff}
.sc-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:12px;font-weight:700;color:var(--muted);transition:.3s;text-decoration:none}
.srv-card:hover .sc-link{color:var(--cobalt)}
.sc-link .ar{transition:.3s}.srv-card:hover .sc-link .ar{transform:translateX(4px)}

/* ─ 云插画 ─ */
.art-cloud-light{position:relative;width:200px;height:130px}
.acl-box{position:absolute;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-family:'JetBrains Mono',monospace;font-size:10px;font-weight:500;animation:float 3s ease-in-out infinite}
.acl-1{width:110px;height:64px;background:#fff;border:1.5px solid #c8d8ff;color:var(--cobalt);top:0;left:0;box-shadow:0 4px 16px rgba(27,75,255,.1)}
.acl-2{width:88px;height:56px;background:#fff;border:1.5px solid #ffd0c8;color:var(--coral);top:16px;right:0;box-shadow:0 4px 12px rgba(255,77,46,.1);animation-delay:.5s}
.acl-3{width:96px;height:52px;background:#fff;border:1.5px solid #c8f0d8;color:#1c8a40;bottom:0;left:24px;box-shadow:0 4px 12px rgba(28,180,90,.1);animation-delay:1s}
.acl-connector{position:absolute;background:var(--sand);border-radius:1px}
.acc1{width:1px;height:28px;top:52px;left:55px}
.acc2{width:1px;height:22px;top:48px;right:44px}

/* ─ 数据柱图（浅色版）─ */
.art-bars-light{display:flex;align-items:flex-end;gap:10px;height:110px;padding:0 16px}
.abl{border-radius:6px 6px 0 0;animation:grow-up 1.4s cubic-bezier(.34,1.56,.64,1) forwards;transform:scaleY(0);transform-origin:bottom}
@keyframes grow-up{to{transform:scaleY(1)}}
.abl:nth-child(1){width:26px;height:45%;background:#DAE4FF;animation-delay:.1s}
.abl:nth-child(2){width:26px;height:70%;background:#c2d8ff;animation-delay:.2s}
.abl:nth-child(3){width:26px;height:58%;background:#a0c2ff;animation-delay:.3s}
.abl:nth-child(4){width:26px;height:95%;background:linear-gradient(to top,var(--cobalt),#82b4ff);animation-delay:.4s;box-shadow:0 4px 16px rgba(27,75,255,.3)}
.abl:nth-child(5){width:26px;height:72%;background:#b4cfff;animation-delay:.5s}
.abl:nth-child(6){width:26px;height:48%;background:#d0e2ff;animation-delay:.6s}

/* ─ AI 神经网 ─ */
.art-nn-light{position:relative;width:200px;height:130px}

/* ─ 运维波形 ─ */
.art-wave-light{padding:0 20px;width:100%}

/* ─ 技能仪表条 ─ */
.art-gauge-light{width:200px}
.agl-row{margin-bottom:12px}
.agl-label{display:flex;justify-content:space-between;font-size:10px;font-weight:600;color:var(--ink2);margin-bottom:5px;letter-spacing:.03em}
.agl-track{height:6px;background:var(--sand);border-radius:100px;overflow:hidden}
.agl-fill{height:100%;border-radius:100px;animation:fill-up 1.6s cubic-bezier(.34,1.2,.64,1) forwards;transform-origin:left;transform:scaleX(0)}
@keyframes fill-up{to{transform:scaleX(1)}}

/* ══════════════ REVIEWS ══════════════ */
#reviews{background:var(--sand)}
.rv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:860px){.rv-grid{grid-template-columns:1fr}}
.rv{background:#fff;border-radius:20px;padding:36px 32px;position:relative;overflow:hidden;transition:.4s}
.rv:hover{transform:translateY(-6px);box-shadow:0 24px 60px rgba(0,0,0,.1)}
/* 大引号装饰 */
.rv::before{content:'"';position:absolute;top:-16px;right:24px;font-family:'DM Serif Display',serif;font-size:120px;color:rgba(0,0,0,.04);line-height:1;pointer-events:none}
/* 顶部彩条 */
.rv::after{content:'';position:absolute;top:0;left:0;right:0;height:4px}
.rv-c1::after{background:linear-gradient(90deg,var(--cobalt),#82b4ff)}
.rv-c2::after{background:linear-gradient(90deg,var(--lime),#7ab800)}
.rv-c3::after{background:linear-gradient(90deg,var(--coral),#ff8c6e)}
.rv-stars{display:flex;gap:2px;margin-bottom:18px}
.rv-stars span{color:var(--amber);font-size:15px}
.rv-text{font-size:14px;line-height:1.95;color:var(--ink2);margin-bottom:28px;font-style:italic}
.rv-foot{display:flex;align-items:center;gap:14px}
.rv-av{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'DM Serif Display',serif;font-size:20px;color:#fff;flex-shrink:0}
.rv-a1{background:linear-gradient(135deg,var(--cobalt),#82b4ff)}
.rv-a2{background:linear-gradient(135deg,#1c8a40,var(--lime))}
.rv-a3{background:linear-gradient(135deg,var(--coral),var(--amber))}
.rv-info strong{font-size:14px;font-weight:700;color:var(--ink);display:block;margin-bottom:2px}
.rv-info span{font-size:12px;color:var(--muted)}

/* ══════════════ PARTNERS ══════════════ */
#partners{background:#fff;padding:80px 0;overflow:hidden;position:relative}
#partners::before,#partners::after{content:'';position:absolute;top:0;bottom:0;width:200px;z-index:2;pointer-events:none}
#partners::before{left:0;background:linear-gradient(90deg,#fff,transparent)}
#partners::after{right:0;background:linear-gradient(-90deg,#fff,transparent)}
.pt-hd{text-align:center;font-size:11px;letter-spacing:.22em;font-weight:700;color:var(--muted);margin-bottom:40px;font-family:'Plus Jakarta Sans',sans-serif}
.pt-rail{display:flex;gap:24px;animation:rail 22s linear infinite;width:max-content}
.pt-rail:hover{animation-play-state:paused}
.ptl{height:60px;min-width:160px;border:1.5px solid var(--sand);border-radius:12px;display:flex;align-items:center;justify-content:center;padding:0 28px;flex-shrink:0;transition:.3s;background:#fff}
.ptl:hover{border-color:var(--cobalt);background:rgba(27,75,255,.03)}
.ptl span{font-family:'DM Serif Display',serif;font-size:14px;color:var(--muted);white-space:nowrap;letter-spacing:.05em;transition:.3s}
.ptl:hover span{color:var(--cobalt)}
@keyframes rail{to{transform:translateX(-50%)}}

/* ══════════════ NEWS ══════════════ */
#news{background:var(--cream)}
.news-hd{display:flex;justify-content:space-between;align-items:center;margin-bottom:56px}
.news-hd h2{font-family:'DM Serif Display',serif;font-size:clamp(28px,4vw,48px);letter-spacing:-.02em;line-height:1.1}
.news-hd h2 span{color:var(--coral)}
.news-hd-right{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--cobalt);text-decoration:none;transition:.3s}
.news-hd-right:hover{gap:14px}
/* 编辑式三列 */
.news-col3{display:grid;grid-template-columns:2fr 1.1fr 1.1fr;gap:32px;align-items:start}
@media(max-width:900px){.news-col3{grid-template-columns:1fr}}
/* 主故事 */
.ns-main{background:#fff;border-radius:20px;overflow:hidden;transition:.4s;text-decoration:none;display:block;color:inherit}
.ns-main:hover{transform:translateY(-6px);box-shadow:0 24px 60px rgba(0,0,0,.1)}
.ns-main-img{height:240px;position:relative;overflow:hidden;background:linear-gradient(135deg,#EEF2FF 0%,#DAE4FF 100%);display:flex;align-items:center;justify-content:center}
.ns-main-img::before{content:'';position:absolute;inset:0;background:repeating-linear-gradient(60deg,transparent,transparent 20px,rgba(27,75,255,.04) 20px,rgba(27,75,255,.04) 21px)}
.ns-emoji{font-size:48px;position:relative;z-index:1}
.ns-badge{position:absolute;bottom:18px;left:18px;padding:5px 14px;background:var(--cobalt);color:#fff;border-radius:100px;font-size:11px;font-weight:700;letter-spacing:.1em}
.ns-main-body{padding:28px 28px 32px}
.ns-main-body h3{font-family:'DM Serif Display',serif;font-size:24px;line-height:1.35;letter-spacing:-.01em;margin-bottom:12px;color:var(--ink)}
.ns-main-body p{font-size:13.5px;color:var(--muted);line-height:1.85}
.ns-meta{display:flex;gap:14px;margin-top:20px;font-size:11px;color:var(--muted);font-weight:500}
/* 侧栏故事 */
.ns-item{background:#fff;border-radius:16px;padding:24px;transition:.4s;display:flex;flex-direction:column;gap:12px;text-decoration:none;color:inherit;margin-bottom:16px}
.ns-item:last-child{margin-bottom:0}
.ns-item:hover{transform:translateY(-4px);box-shadow:0 16px 48px rgba(0,0,0,.09)}
.ns-item-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.ni-bg-1{background:rgba(162,89,255,.1)}
.ni-bg-2{background:rgba(28,180,90,.1)}
.ni-bg-3{background:rgba(255,176,32,.15)}
.ns-item h4{font-family:'DM Serif Display',serif;font-size:17px;line-height:1.4;color:var(--ink)}
.ns-item p{font-size:12.5px;color:var(--muted);line-height:1.75}
.ns-item-meta{font-size:11px;color:var(--muted);font-weight:500;display:flex;gap:10px}
.ns-item-badge{display:inline-block;padding:3px 10px;border-radius:100px;font-size:10px;font-weight:700;letter-spacing:.1em}
.nb-vio{background:rgba(162,89,255,.1);color:#7b2fff}
.nb-grn{background:rgba(28,180,90,.1);color:#1c8a40}
.nb-amb{background:rgba(255,176,32,.15);color:#8a5a00}

/* ══════════════ ABOUT ══════════════ */
#about{background:var(--ink);color:#fff;overflow:hidden;position:relative}
/* 斜切装饰 */
#about::before{content:'';position:absolute;top:0;right:0;width:40%;height:100%;background:rgba(255,255,255,.02);clip-path:polygon(20% 0,100% 0,100% 100%,0 100%)}
.about-layout{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:center}
@media(max-width:860px){.about-layout{grid-template-columns:1fr}}
.ab-l .eyebrow-w{font-size:11px;letter-spacing:.2em;font-weight:700;color:var(--lime);margin-bottom:18px;display:flex;align-items:center;gap:8px}
.ab-l .eyebrow-w::before{content:'';width:20px;height:2px;background:var(--lime)}
.ab-l h2{font-family:'DM Serif Display',serif;font-size:clamp(30px,4vw,52px);line-height:1.1;letter-spacing:-.02em;margin-bottom:24px}
.ab-l h2 em{font-style:italic;color:var(--lime)}
.ab-l p{font-size:14.5px;color:rgba(255,255,255,.5);line-height:2;margin-bottom:14px;max-width:480px}
.ab-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:40px 0 44px}
.abs{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:22px 24px;transition:.3s}
.abs:hover{background:rgba(194,255,74,.07);border-color:rgba(194,255,74,.2)}
.abs strong{font-family:'DM Serif Display',serif;font-size:34px;color:var(--lime);line-height:1;display:block;margin-bottom:6px}
.abs span{font-size:12px;color:rgba(255,255,255,.45);letter-spacing:.04em}
.btn-lime{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;background:var(--lime);color:var(--ink);font-size:14px;font-weight:800;border-radius:100px;text-decoration:none;transition:.3s;letter-spacing:.02em}
.btn-lime:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(194,255,74,.4)}

/* 右侧技术卡片堆叠 */
.ab-r{position:relative;height:420px}
.tech-stack{position:absolute;inset:0;display:flex;flex-direction:column;gap:14px;justify-content:center}
.ts-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:16px 22px;display:flex;align-items:center;gap:16px;transition:.4s;cursor:default}
.ts-card:hover{background:rgba(194,255,74,.07);border-color:rgba(194,255,74,.25);transform:translateX(8px)}
.ts-icon{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.tsi-1{background:rgba(194,255,74,.15)}
.tsi-2{background:rgba(27,75,255,.2)}
.tsi-3{background:rgba(255,77,46,.15)}
.tsi-4{background:rgba(28,180,90,.15)}
.tsi-5{background:rgba(255,176,32,.15)}
.ts-info strong{display:block;font-size:14px;font-weight:700;color:#fff;margin-bottom:4px}
.ts-info span{font-size:12px;color:rgba(255,255,255,.4)}
.ts-bar{margin-left:auto;width:80px;height:4px;background:rgba(255,255,255,.08);border-radius:100px;overflow:hidden;flex-shrink:0}
.ts-fill{height:100%;border-radius:100px;background:linear-gradient(90deg,var(--lime),#7ab800);animation:fill-up 1.6s ease forwards;transform-origin:left;transform:scaleX(0)}

/* ══════════════ FOOTER ══════════════ */
#footer{background:#06080F;color:#fff;padding:80px 0 32px;border-top:1px solid rgba(255,255,255,.06)}
.ft-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1.4fr;gap:56px;margin-bottom:64px}
@media(max-width:960px){.ft-grid{grid-template-columns:1fr 1fr}}
.ft-brand .logo{color:#fff;margin-bottom:16px;display:inline-flex}
.ft-brand .logo-dot{background:var(--lime)}
.ft-brand p{font-size:13px;color:rgba(255,255,255,.4);line-height:1.9;max-width:240px;margin-bottom:28px}
.ft-socials{display:flex;gap:10px}
.ft-soc{width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:14px;cursor:pointer;transition:.3s;text-decoration:none;color:rgba(255,255,255,.4)}
.ft-soc:hover{border-color:var(--lime);background:rgba(194,255,74,.08);color:var(--lime)}
.ft-col h4{font-family:'DM Serif Display',serif;font-size:16px;font-weight:400;color:#fff;margin-bottom:22px;letter-spacing:.01em}
.ft-col ul{list-style:none}
.ft-col li{margin-bottom:12px}
.ft-col a{color:rgba(255,255,255,.4);text-decoration:none;font-size:13px;transition:.3s;display:inline-block}
.ft-col a:hover{color:#fff;transform:translateX(4px)}
.ft-contact li{display:flex;gap:10px;margin-bottom:14px;color:rgba(255,255,255,.4);font-size:13px;align-items:flex-start;list-style:none}
.ft-ico{flex-shrink:0;margin-top:1px;opacity:.5}
.ft-bottom{border-top:1px solid rgba(255,255,255,.07);padding-top:28px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px}
.ft-bottom p,.ft-bottom a{font-size:12px;color:rgba(255,255,255,.3);text-decoration:none;transition:.3s}
.ft-bottom a:hover{color:var(--lime)}
.ft-icp{display:flex;gap:24px}

/* 回顶 */
#topbtn{position:fixed;bottom:32px;right:32px;width:46px;height:46px;border-radius:50%;background:var(--ink);border:2px solid var(--lime);color:var(--lime);font-size:18px;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:99;opacity:0;transform:scale(.6);transition:.3s;box-shadow:0 8px 24px rgba(0,0,0,.2)}
#topbtn.show{opacity:1;transform:scale(1)}
#topbtn:hover{background:var(--lime);color:var(--ink);transform:scale(1.1)}

/* ── 响应式补丁 ── */
@media(max-width:900px){
  #hero{grid-template-columns:1fr}.hero-r{display:none}
  .srv-featured{grid-template-columns:1fr}.sf-right{height:220px}
  .srv-grid{grid-template-columns:1fr 1fr}
  .about-layout{grid-template-columns:1fr}.ab-r{display:none}
}
@media(max-width:600px){
  .wrap{padding:0 24px}.srv-grid{grid-template-columns:1fr}
  #nav{padding:0 24px}.hero-l{padding:100px 24px 60px}
}