/* ============ 山海释味官网 · 多页版共用样式 ============ */
:root{
  --green:#1e6f5c; --green-deep:#0f2c24; --green-mid:#124639; --green-soft:#eaf3ef;
  --gold:#c2913a; --gold-lt:#e9c87a; --gold-deep:#8a6a1a;
  --ink:#1c2420; --ink2:#3c4642; --muted:#6b7672;
  --bg:#faf8f3; --card:#ffffff; --line:#e6e2d8;
  --serif:"Noto Serif SC","Source Han Serif SC","STZhongsong","SimSun",serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.8;-webkit-font-smoothing:antialiased;font-size:15.5px;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
::selection{background:rgba(194,145,58,.25);}

/* ---------- 页面过渡（仅在 JS 可用时启用） ---------- */
.js body{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease;}
.js body.ready{opacity:1;transform:none;}
.js body.leaving{opacity:0;transform:translateY(-10px);transition:opacity .35s ease,transform .35s ease;}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;
  padding:16px 5vw;background:transparent;transition:.35s;}
.nav.solid{background:rgba(250,248,243,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:11px 5vw;}
.nav.on-dark:not(.solid) .brand .bt b{color:#fff;}
.nav.on-dark:not(.solid) .brand .bt span{color:rgba(255,255,255,.6);}
.nav.on-dark:not(.solid) .nav-links a{color:rgba(255,255,255,.85);}
.nav.on-dark:not(.solid) .menu-btn svg{stroke:#fff;}
.brand{display:flex;align-items:center;gap:11px;}
.brand img{height:48px;width:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.15));}
.brand .bt{line-height:1.25;}
.brand .bt b{font-family:var(--serif);font-size:21px;letter-spacing:2.5px;color:var(--green-deep);display:block;}
.brand .bt span{font-size:12px;color:var(--muted);letter-spacing:1.8px;}
.nav-links{display:flex;gap:30px;align-items:center;font-size:15.5px;color:var(--ink2);margin-left:auto;}
.nav-links a{padding:4px 2px;position:relative;white-space:nowrap;letter-spacing:1px;transition:color .25s;}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:-4px;width:0;height:2px;background:var(--gold);transition:.28s;transform:translateX(-50%);}
.nav-links a:hover::after,.nav-links a.active::after{width:70%;}
.nav-links a.active{color:var(--gold-deep);}
.nav-cta{border:1px solid currentColor;border-radius:99px;padding:8px 22px !important;margin-left:26px;color:var(--ink2);}
.nav-cta::after{display:none !important;}
.nav-cta:hover{background:var(--gold);border-color:var(--gold);color:#fff !important;}
.menu-btn{display:none;background:none;border:none;cursor:pointer;padding:6px;}
.menu-btn svg{width:26px;height:26px;stroke:var(--green-deep);}
@media (max-width:980px){
  /* 平板/手机：不再用汉堡抽屉，导航在移动端适配层改为「常驻双行」结构 */
}

/* ---------- 首页 Hero ---------- */
.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden;
  color:#fff;padding:140px 6vw 110px;}
.hero .bg{position:absolute;inset:-6%;background:url("../assets/spices.jpg") center/cover no-repeat;
  animation:kb 26s ease-in-out infinite alternate;}
@keyframes kb{from{transform:scale(1);}to{transform:scale(1.12) translateX(-1.5%);}}
.hero .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,30,24,.92) 0%,rgba(15,44,36,.74) 46%,rgba(15,44,36,.28) 100%);}
.hero-in{position:relative;z-index:2;max-width:1280px;}
.hero .kicker{display:flex;align-items:center;gap:14px;font-size:13px;letter-spacing:5px;color:var(--gold-lt);margin-bottom:26px;}
.hero .kicker::before{content:"";width:44px;height:1px;background:var(--gold-lt);}
.hero h1{font-family:var(--serif);font-weight:600;font-size:clamp(38px,5.6vw,68px);line-height:1.32;letter-spacing:4px;}
.hero h1 em{font-style:normal;color:var(--gold-lt);}
.hero .motto{display:flex;align-items:center;gap:16px;margin-top:28px;font-family:var(--serif);font-size:clamp(18px,1.7vw,23px);letter-spacing:6px;color:var(--gold-lt);}
.hero .motto::before{content:"";flex:0 0 52px;height:1px;background:var(--gold-lt);opacity:.85;}
.hero .motto i{width:4px;height:4px;border-radius:50%;background:var(--gold-lt);opacity:.7;margin:0 -6px;flex:0 0 auto;}
.hero .motto+.sub{margin-top:18px;}
@media (max-width:640px){.hero .motto{font-size:17px;letter-spacing:3px;gap:10px;}.hero .motto::before{flex-basis:32px;}}
.hero .sub{margin-top:26px;font-size:clamp(15px,1.6vw,18.5px);color:rgba(255,255,255,.82);letter-spacing:1.5px;max-width:36em;}
.hero .actions{margin-top:44px;display:flex;gap:18px;flex-wrap:wrap;}
.btn{display:inline-block;padding:14px 38px;border-radius:99px;font-size:15px;letter-spacing:2px;transition:.3s;}
.btn-primary{background:var(--gold);color:#fff;box-shadow:0 10px 30px rgba(194,145,58,.35);}
.btn-primary:hover{background:#b07f2a;transform:translateY(-3px);box-shadow:0 16px 38px rgba(194,145,58,.45);}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;}
.scroll-hint{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:8px;color:rgba(255,255,255,.6);font-size:11px;letter-spacing:3px;}
.scroll-hint .wire{width:1px;height:44px;background:linear-gradient(rgba(255,255,255,.6),transparent);animation:drop 2.2s ease infinite;}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top;}55%{transform:scaleY(1);transform-origin:top;}100%{transform:scaleY(0);transform-origin:bottom;}}

/* ---------- 页首横幅（内页） ---------- */
.page-hero{position:relative;color:#fff;padding:190px 6vw 90px;overflow:hidden;}
.page-hero .bg{position:absolute;inset:0;background:center/cover no-repeat;animation:kb 24s ease-in-out infinite alternate;}
.page-hero .veil{position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,30,24,.9),rgba(15,44,36,.55));}
.page-hero .ph-in{position:relative;z-index:2;max-width:1280px;}
.page-hero .no{font-size:13px;letter-spacing:5px;color:var(--gold-lt);margin-bottom:18px;display:flex;align-items:center;gap:14px;}
.page-hero .no::after{content:"";width:60px;height:1px;background:rgba(233,200,122,.5);}
.page-hero h1{font-family:var(--serif);font-weight:600;font-size:clamp(32px,4.4vw,52px);letter-spacing:3px;}
.page-hero p{margin-top:18px;color:rgba(255,255,255,.78);max-width:44em;letter-spacing:1px;}

/* ---------- 区块 ---------- */
section{padding:100px 6vw;}
.sec-head{max-width:820px;margin:0 auto 64px;}
.sec-head .idx{display:flex;align-items:center;gap:16px;font-size:12.5px;letter-spacing:4px;color:var(--gold-deep);margin-bottom:20px;}
.sec-head .idx::after{content:"";flex:0 0 56px;height:1px;background:var(--gold);}
.sec-head h2{font-family:var(--serif);font-weight:600;font-size:clamp(27px,3.4vw,40px);letter-spacing:2px;color:var(--green-deep);}
.sec-head h2 em{font-style:normal;color:var(--gold);}
.sec-head p{margin-top:16px;color:var(--muted);font-size:15px;}
.sec-head.center{text-align:center;}
.sec-head.center .idx{justify-content:center;}
.sec-head.center .idx::before{content:"";flex:0 0 56px;height:1px;background:var(--gold);}
.dark{background:var(--green-deep);color:#eef4f1;}
.dark .sec-head h2{color:#fff;}
.dark .sec-head p{color:rgba(255,255,255,.62);}
.dark .sec-head .idx{color:var(--gold-lt);}
.dark .sec-head .idx::after{background:var(--gold-lt);}

/* ---------- 渐显 ---------- */
.rv{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s ease;}
.rv.in{opacity:1;transform:none;}
.rv.d1{transition-delay:.12s;}.rv.d2{transition-delay:.24s;}.rv.d3{transition-delay:.36s;}

/* ---------- 首页：定位陈述 ---------- */
.statement{background:var(--bg);}
.statement .st-in{max-width:980px;margin:0 auto;display:grid;grid-template-columns:auto 1fr;gap:44px;align-items:start;}
.statement .side-no{font-family:var(--serif);font-size:15px;letter-spacing:4px;color:var(--gold-deep);border-top:3px solid var(--gold);padding-top:14px;white-space:nowrap;}
.statement h2{font-family:var(--serif);font-weight:600;font-size:clamp(24px,2.9vw,34px);line-height:1.75;color:var(--green-deep);letter-spacing:1px;}
.statement h2 em{font-style:normal;border-bottom:3px solid var(--gold-lt);}
.statement .st-p{margin-top:22px;color:var(--ink2);font-size:15.5px;max-width:46em;}
@media (max-width:800px){.statement .st-in{grid-template-columns:1fr;gap:20px;}}

/* ---------- 数字带 ---------- */
.band{background:var(--green-mid);color:#fff;padding:64px 6vw;}
.band .band-in{max-width:1240px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.16);border-radius:10px;overflow:hidden;}
.band .b{background:var(--green-mid);padding:34px 30px;text-align:center;transition:.3s;}
.band .b:hover{background:var(--green-deep);}
.band b{font-family:var(--serif);font-size:clamp(26px,3vw,40px);color:var(--gold-lt);display:block;font-variant-numeric:tabular-nums;line-height:1.2;}
.band .b>span{font-size:12.5px;color:rgba(255,255,255,.72);letter-spacing:1.5px;display:block;margin-top:8px;}
@media (max-width:860px){.band .band-in{grid-template-columns:repeat(2,1fr);}}

/* ---------- 亮点导流卡 ---------- */
.highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;max-width:1280px;margin:0 auto;}
.hl{position:relative;border-radius:14px;overflow:hidden;min-height:430px;display:flex;align-items:flex-end;color:#fff;transition:.35s;box-shadow:0 10px 30px rgba(15,44,36,.12);}
.hl:hover{transform:translateY(-8px);box-shadow:0 26px 60px rgba(15,44,36,.22);}
.hl .bg{position:absolute;inset:0;background:center/cover no-repeat;transition:transform .8s ease;}
.hl:hover .bg{transform:scale(1.07);}
.hl .shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,30,24,.05) 30%,rgba(8,30,24,.88) 100%);}
.hl .txt{position:relative;z-index:2;padding:34px 30px;}
.hl .hl-no{font-size:12px;letter-spacing:4px;color:var(--gold-lt);margin-bottom:10px;}
.hl h3{font-family:var(--serif);font-size:24px;letter-spacing:2px;margin-bottom:10px;}
.hl p{font-size:13.5px;color:rgba(255,255,255,.78);}
.hl .go{display:inline-flex;align-items:center;gap:8px;margin-top:18px;font-size:13px;letter-spacing:2px;color:var(--gold-lt);}
.hl .go svg{width:18px;height:18px;stroke:var(--gold-lt);transition:transform .3s;}
.hl:hover .go svg{transform:translateX(6px);}
@media (max-width:920px){.highlights{grid-template-columns:1fr;}.hl{min-height:340px;}}

/* ---------- 通用卡片组 ---------- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;max-width:1280px;margin:0 auto;}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;max-width:1360px;margin:0 auto;}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:38px 32px;transition:.35s;position:relative;overflow:hidden;}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--green),var(--gold));transform:scaleX(0);transform-origin:left;transition:.4s;}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 48px rgba(15,44,36,.12);}
.card:hover::before{transform:scaleX(1);}
.card .ico{width:54px;height:54px;border-radius:14px;background:var(--green-soft);display:flex;align-items:center;justify-content:center;margin-bottom:22px;}
.card .ico svg{width:28px;height:28px;stroke:var(--green);}
.card h3{font-family:var(--serif);font-size:19px;color:var(--green-deep);margin-bottom:10px;letter-spacing:1px;}
.card p{font-size:13.8px;color:var(--muted);}
@media (max-width:920px){.grid3{grid-template-columns:1fr;}.grid4{grid-template-columns:repeat(2,1fr);}}
@media (max-width:600px){.grid4{grid-template-columns:1fr;}}

/* ---------- 深色引擎卡 ---------- */
.engine{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:42px 32px;transition:.35s;}
.engine:hover{background:rgba(255,255,255,.09);transform:translateY(-6px);}
.engine .icon{width:58px;height:58px;border-radius:14px;background:linear-gradient(135deg,var(--gold),#a87622);display:flex;align-items:center;justify-content:center;margin-bottom:24px;box-shadow:0 8px 22px rgba(194,145,58,.3);}
.engine .icon svg{width:30px;height:30px;stroke:#fff;}
.engine .no{font-size:11.5px;letter-spacing:4px;color:var(--gold-lt);margin-bottom:10px;}
.engine h3{font-family:var(--serif);font-size:22px;letter-spacing:1px;margin-bottom:14px;}
.engine p{font-size:14px;color:rgba(255,255,255,.72);}

/* ---------- 对比表 ---------- */
.compare{max-width:1020px;margin:0 auto;background:rgba(0,0,0,.20);border:1px solid rgba(255,255,255,.14);border-radius:14px;overflow:hidden;}
.compare table{width:100%;border-collapse:collapse;font-size:14.5px;}
.compare th,.compare td{padding:17px 24px;text-align:left;border-bottom:1px solid rgba(255,255,255,.09);}
.compare tr:last-child td{border-bottom:none;}
.compare th{color:var(--gold-lt);font-weight:600;letter-spacing:2px;font-size:13px;}
.compare td.dim{color:rgba(255,255,255,.5);}
.compare td.good{color:#8fe3c4;font-weight:700;font-variant-numeric:tabular-nums;}
@media (max-width:640px){.compare th,.compare td{padding:12px;font-size:13px;}}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;max-width:1280px;margin:0 auto;align-items:center;}
.split .pic{border-radius:16px;overflow:hidden;position:relative;box-shadow:0 26px 64px rgba(15,44,36,.18);}
.split .pic img{transition:transform .8s ease;}
.split .pic:hover img{transform:scale(1.05);}
.split .pic .cap{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(8,30,24,.85));color:#fff;padding:44px 22px 16px;font-size:13px;letter-spacing:1px;}
.split .rv-txt h2{font-family:var(--serif);font-weight:600;font-size:clamp(24px,3vw,34px);color:var(--green-deep);letter-spacing:2px;margin-bottom:18px;}
.split .rv-txt>div>em{font-style:normal;color:var(--gold);}
.split .rv-txt p.lead{color:var(--ink2);font-size:15px;margin-bottom:24px;}
@media (max-width:920px){.split{grid-template-columns:1fr;}}

.jc{display:grid;gap:12px;margin-top:26px;}
.jc .row{display:flex;gap:16px;align-items:stretch;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 20px;transition:.3s;}
.jc .row:hover{border-color:var(--gold);transform:translateX(6px);}
.jc .zi{flex:0 0 46px;height:46px;border-radius:10px;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:22px;}
.jc .row:nth-child(2) .zi{background:#2a8a72;}
.jc .row:nth-child(3) .zi{background:var(--gold);}
.jc .row:nth-child(4) .zi{background:#8a6a1a;}
.jc b{display:block;font-size:15px;}
.jc span{font-size:13px;color:var(--muted);}

/* ---------- 场景卡（深色） ---------- */
.scene{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);border-radius:14px;padding:36px 28px;transition:.35s;}
.scene:hover{background:rgba(255,255,255,.09);transform:translateY(-6px);}
.scene .s-tag{display:inline-block;font-size:11.5px;letter-spacing:3px;color:var(--gold-lt);border:1px solid rgba(233,200,122,.4);border-radius:99px;padding:3px 14px;margin-bottom:18px;}
.scene h3{font-family:var(--serif);font-size:20px;color:#fff;margin-bottom:12px;letter-spacing:1px;}
.scene p{font-size:13.5px;color:rgba(255,255,255,.7);}

/* ---------- 实证案例 ---------- */
.proof{max-width:1160px;margin:60px auto 0;background:linear-gradient(120deg,rgba(233,200,122,.14),rgba(255,255,255,.04));border:1px solid rgba(233,200,122,.3);border-radius:16px;padding:46px 48px;}
.proof h3{font-family:var(--serif);font-size:23px;color:#fff;margin-bottom:6px;letter-spacing:1px;}
.proof .p-sub{font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:28px;}
.proof .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.proof .metrics b{font-size:23px;color:var(--gold-lt);display:block;font-variant-numeric:tabular-nums;}
.proof .metrics span{font-size:12.5px;color:rgba(255,255,255,.7);}
@media (max-width:860px){.proof{padding:32px 24px;}.proof .metrics{grid-template-columns:repeat(2,1fr);}}

/* ---------- 品质清单 ---------- */
.q-list{display:grid;gap:16px;}
.q-list .q{display:flex;gap:16px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px 22px;transition:.3s;}
.q-list .q:hover{border-color:var(--green);transform:translateX(6px);}
.q-list .q svg{flex:0 0 26px;width:26px;height:26px;stroke:var(--green);margin-top:3px;}
.q-list b{display:block;font-size:15.5px;}
.q-list span{font-size:13.5px;color:var(--muted);}

/* ---------- 中心卡片 ---------- */
.center{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.35s;}
.center:hover{transform:translateY(-6px);box-shadow:0 20px 48px rgba(15,44,36,.12);}
.center img{height:230px;width:100%;object-fit:cover;transition:transform .8s ease;}
.center:hover img{transform:scale(1.06);}
.center .c-bd{padding:26px 26px 30px;}
.center h3{font-family:var(--serif);font-size:18.5px;color:var(--green-deep);margin-bottom:8px;letter-spacing:1px;}
.center p{font-size:13.5px;color:var(--muted);}

/* ---------- 院士 ---------- */
.acad{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1140px;margin:0 auto 40px;}
.acad .a{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);border-radius:14px;padding:36px 28px;text-align:center;transition:.35s;}
.acad .a:hover{background:rgba(255,255,255,.09);transform:translateY(-6px);}
.acad .zi{width:62px;height:62px;margin:0 auto 16px;border-radius:50%;background:rgba(233,200,122,.15);border:1px solid rgba(233,200,122,.4);color:var(--gold-lt);display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:28px;}
.acad b{display:block;font-size:17px;color:#fff;letter-spacing:1px;}
.acad i{font-style:normal;font-size:12.5px;color:var(--gold-lt);letter-spacing:2px;display:block;margin:6px 0 12px;}
.acad p{font-size:12.8px;color:rgba(255,255,255,.65);}
@media (max-width:860px){.acad{grid-template-columns:1fr;}}
.uni-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:960px;margin:0 auto;}
.uni-row span{font-size:13px;border:1px solid rgba(255,255,255,.22);border-radius:99px;padding:8px 22px;color:rgba(255,255,255,.82);letter-spacing:1px;transition:.3s;}
.uni-row span:hover{border-color:var(--gold-lt);color:var(--gold-lt);}

/* ---------- 团队 ---------- */
.team{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1280px;margin:0 auto;}
.team .t{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:32px 30px;transition:.35s;position:relative;}
.team .t::after{content:"";position:absolute;top:0;left:0;width:44px;height:3px;background:var(--gold);transition:.4s;}
.team .t:hover{transform:translateY(-6px);box-shadow:0 18px 44px rgba(15,44,36,.12);}
.team .t:hover::after{width:100%;}
.team .t b{font-size:17.5px;display:block;font-family:var(--serif);letter-spacing:1px;}
.team .t i{font-style:normal;font-size:12.5px;color:var(--gold-deep);display:block;margin:5px 0 10px;letter-spacing:1.5px;}
.team .t p{font-size:13.3px;color:var(--muted);}
@media (max-width:920px){.team{grid-template-columns:1fr;}}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;max-width:1240px;margin:0 auto;}
.step{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:42px 34px;position:relative;transition:.35s;}
.step:hover{transform:translateY(-6px);box-shadow:0 20px 48px rgba(15,44,36,.12);}
.step .sn{font-family:var(--serif);font-size:58px;color:#ece5d2;position:absolute;top:16px;right:26px;line-height:1;font-weight:700;}
.step h3{font-family:var(--serif);font-size:20px;color:var(--green-deep);margin-bottom:16px;letter-spacing:1px;}
.step ul{list-style:none;display:grid;gap:9px;}
.step li{font-size:13.8px;color:var(--ink2);padding-left:18px;position:relative;}
.step li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--gold);}
.step .out{margin-top:20px;font-size:13px;color:var(--gold-deep);background:#fdfaf2;border:1px dashed #d8c793;border-radius:8px;padding:9px 15px;}
@media (max-width:920px){.steps{grid-template-columns:1fr;}}

/* ---------- 联系 ---------- */
.contact-wrap{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:start;}
.c-list{display:grid;gap:14px;}
.c-list .row{display:flex;gap:16px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px 22px;transition:.3s;}
.c-list .row:hover{border-color:var(--green);}
.c-list svg{flex:0 0 22px;width:22px;height:22px;stroke:var(--green);margin-top:3px;}
.c-list b{display:block;font-size:12.5px;color:var(--muted);font-weight:400;letter-spacing:2px;}
.c-list span{font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums;}
.certs{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;}
.certs img{border-radius:8px;}
.certs .cap{font-size:12.5px;color:var(--muted);margin-top:14px;text-align:center;letter-spacing:1px;}
@media (max-width:920px){.contact-wrap{grid-template-columns:1fr;}}

/* ---------- 下一页导流 ---------- */
.next{background:var(--green-deep);padding:0 6vw;}
.next a{display:block;max-width:1280px;margin:0 auto;padding:96px 30px;color:#fff;position:relative;}
.next .nx-k{font-size:12.5px;letter-spacing:5px;color:var(--gold-lt);margin-bottom:16px;}
.next h2{font-family:var(--serif);font-weight:600;font-size:clamp(30px,4.2vw,50px);letter-spacing:3px;display:inline-flex;align-items:center;gap:24px;transition:.3s;}
.next h2 svg{width:44px;height:44px;stroke:var(--gold-lt);transition:transform .35s;}
.next p{margin-top:14px;color:rgba(255,255,255,.55);letter-spacing:1px;}
.next a::before{content:"";position:absolute;left:30px;right:30px;top:0;height:1px;background:rgba(255,255,255,.15);}
.next a:hover h2{color:var(--gold-lt);}
.next a:hover h2 svg{transform:translateX(14px);}

/* ---------- 页脚 ---------- */
footer{background:#0a201a;color:rgba(255,255,255,.55);padding:56px 6vw 40px;}
.f-in{max-width:1280px;margin:0 auto;display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;align-items:flex-start;}
.f-brand{font-family:var(--serif);color:rgba(255,255,255,.9);letter-spacing:3px;font-size:20px;}
.f-brand small{display:block;font-family:var(--sans);font-size:11.5px;letter-spacing:2px;color:rgba(255,255,255,.4);margin-top:8px;}
.f-nav{display:flex;gap:34px;flex-wrap:wrap;font-size:13.5px;}
.f-nav a:hover{color:var(--gold-lt);}
.f-bottom{max-width:1280px;margin:36px auto 0;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:12px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:rgba(255,255,255,.35);}

.note{font-size:12px;color:var(--muted);max-width:1160px;margin:28px auto 0;text-align:center;}
.dark .note{color:rgba(255,255,255,.4);}

/* ============================================================
   移动端适配层（覆盖基础规则，按 760px / 420px 两档细化）
   ============================================================ */
html{-webkit-text-size-adjust:100%;}
body{overflow-x:hidden;}

@media (max-width:760px){
  body{font-size:15px;line-height:1.75;}
  html{scroll-padding-top:112px;} /* 双行导航较高，锚点跳转留出空间 */

  /* ---- 导航：常驻双行结构 ----
     第一行：品牌（左） + 合作洽谈按钮（右）
     第二行：横向菜单条，放不下时左右滑动，当前页带金色下划线 */
  .nav{flex-wrap:wrap;padding:10px 16px 0;background:rgba(250,248,243,.96);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);}
  .nav.solid{padding:8px 16px 0;}
  .brand{gap:9px;}
  .brand img{height:36px;}
  .brand .bt b{font-size:15px;letter-spacing:1.5px;}
  .brand .bt span{font-size:9px;letter-spacing:.8px;}
  /* 深色页首上的品牌字色改回深绿（导航现在始终是米白底） */
  .nav.on-dark .brand .bt b{color:var(--green-deep) !important;}
  .nav.on-dark .brand .bt span{color:var(--muted) !important;}
  .menu-btn{display:none;}
  .nav-cta{order:2;margin-left:auto;padding:6px 16px !important;font-size:13px;
    color:var(--green-deep) !important;white-space:nowrap;}
  .nav-links{order:3;width:100%;position:static;flex-direction:row;justify-content:flex-start;
    gap:2px;background:none;box-shadow:none;padding:4px 0 10px;overflow-x:auto;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;}
  .nav-links::-webkit-scrollbar{display:none;}
  .nav-links a{color:var(--ink) !important;font-size:14px;padding:6px 10px;
    letter-spacing:.5px;white-space:nowrap;}
  .nav-links a.active{color:var(--gold-deep) !important;}
  .nav-links a::after{display:block !important;bottom:0;}

  /* ---- 区块节奏 ---- */
  section{padding:64px 20px;}
  .sec-head{margin-bottom:40px;}
  .sec-head .idx{font-size:11.5px;letter-spacing:3px;gap:10px;margin-bottom:14px;}
  .sec-head .idx::after{flex-basis:34px;}
  .sec-head p{font-size:14px;margin-top:12px;}

  /* ---- 首页首屏 ---- */
  .hero{min-height:100svh;padding:132px 20px 72px;}
  .hero .bg{animation:none;inset:0;}
  .hero .veil{background:linear-gradient(160deg,rgba(8,30,24,.92) 0%,rgba(12,38,30,.82) 55%,rgba(12,38,30,.72) 100%);}
  .hero .kicker{font-size:11px;letter-spacing:2.5px;gap:10px;margin-bottom:18px;}
  .hero .kicker::before{width:26px;}
  .hero h1{font-size:clamp(26px,7.4vw,34px);letter-spacing:1px;line-height:1.42;}
  .hero .sub{font-size:14.5px;margin-top:18px;letter-spacing:.5px;}
  .hero .actions{margin-top:30px;gap:12px;}
  .btn{padding:12px 26px;font-size:14.5px;letter-spacing:1px;}
  .scroll-hint{display:none;}

  /* ---- 内页横幅 ---- */
  .page-hero{padding:144px 20px 60px;}
  .page-hero .bg{animation:none;}
  .page-hero .veil{background:linear-gradient(160deg,rgba(8,30,24,.92),rgba(12,38,30,.7));}
  .page-hero .no{font-size:11px;letter-spacing:3px;margin-bottom:14px;}
  .page-hero h1{font-size:clamp(26px,7.4vw,34px);letter-spacing:1.5px;line-height:1.45;}
  .page-hero p{font-size:14px;margin-top:14px;}

  /* ---- 陈述区 ---- */
  .statement .st-in{grid-template-columns:1fr;gap:18px;}
  .statement .side-no{border-top-width:2px;padding-top:10px;font-size:12px;letter-spacing:2px;display:inline-block;}
  .statement h2{font-size:clamp(21px,5.8vw,26px);line-height:1.7;}
  .statement .st-p{font-size:14.5px;margin-top:16px;}

  /* ---- 数字带 ---- */
  .band{padding:38px 18px;}
  .band .b{padding:24px 12px;}
  .band b{font-size:30px;}
  .band .b>span{font-size:11.5px;letter-spacing:.5px;margin-top:6px;line-height:1.5;}

  /* ---- 导流大卡 ---- */
  .highlights{gap:16px;}
  .hl{min-height:270px;border-radius:12px;}
  .hl .txt{padding:26px 22px;}
  .hl h3{font-size:21px;}
  .hl p{font-size:13px;}
  .hl .go{margin-top:14px;font-size:12.5px;}

  /* ---- 卡片组 ---- */
  .grid3,.grid4{gap:16px;}
  .card{padding:28px 22px;border-radius:10px;}
  .card .ico{width:46px;height:46px;border-radius:12px;margin-bottom:16px;}
  .card .ico svg{width:24px;height:24px;}
  .card h3{font-size:17.5px;}
  .card p{font-size:13.5px;}
  .engine{padding:28px 22px;border-radius:12px;}
  .engine .icon{width:50px;height:50px;margin-bottom:18px;}
  .engine h3{font-size:19px;}
  .engine p{font-size:13.5px;}
  .scene{padding:26px 22px;border-radius:12px;}
  .scene h3{font-size:18px;}

  /* ---- 对比表：收紧内距，避免横向溢出 ---- */
  .compare{border-radius:12px;}
  .compare table{font-size:12.5px;}
  .compare th,.compare td{padding:12px 10px;line-height:1.55;}
  .compare th{font-size:11.5px;letter-spacing:1px;}
  .compare th:first-child,.compare td:first-child{padding-left:14px;}
  .compare th:last-child,.compare td:last-child{padding-right:14px;}

  /* ---- 图文分栏 ---- */
  .split{gap:30px;}
  .split .pic{border-radius:12px;}
  .split .pic .cap{font-size:11.5px;padding:32px 16px 12px;}
  .split .rv-txt h2{font-size:clamp(21px,5.8vw,26px);}

  /* ---- 君臣佐使 ---- */
  .jc{gap:10px;margin-top:20px;}
  .jc .row{padding:13px 15px;gap:13px;border-radius:9px;}
  .jc .zi{flex:0 0 40px;height:40px;font-size:19px;border-radius:9px;}
  .jc b{font-size:14.5px;}
  .jc span{font-size:12.5px;}
  .jc .row:hover{transform:none;}

  /* ---- 实证案例 ---- */
  .proof{margin-top:36px;padding:26px 20px;border-radius:12px;}
  .proof h3{font-size:19px;}
  .proof .p-sub{font-size:12.5px;margin-bottom:20px;}
  .proof .metrics{gap:16px 12px;}
  .proof .metrics b{font-size:20px;}
  .proof .metrics span{font-size:11.5px;}

  /* ---- 品质清单 ---- */
  .q-list{gap:12px;}
  .q-list .q{padding:15px 16px;gap:13px;}
  .q-list .q svg{flex:0 0 22px;width:22px;height:22px;}
  .q-list b{font-size:14.5px;}
  .q-list span{font-size:12.8px;}

  /* ---- 中心卡 ---- */
  .center img{height:190px;}
  .center .c-bd{padding:22px 20px 24px;}
  .center h3{font-size:17px;}

  /* ---- 学校 ---- */
  .acad{gap:16px;}
  .acad .a{padding:26px 20px;border-radius:12px;}
  .acad b{font-size:17px;}
  .uni-row{gap:8px;}
  .uni-row span{font-size:12px;padding:7px 15px;letter-spacing:.5px;}

  /* ---- 步骤 ---- */
  .steps{gap:16px;}
  .step{padding:30px 22px;border-radius:12px;}
  .step .sn{font-size:44px;top:12px;right:18px;}
  .step h3{font-size:18.5px;margin-bottom:12px;}
  .step li{font-size:13.5px;}
  .step .out{font-size:12.5px;margin-top:16px;}

  /* ---- 联系 ---- */
  .contact-wrap{gap:26px;}
  .c-list{gap:10px;}
  .c-list .row{padding:14px 16px;gap:12px;}
  .c-list b{font-size:11.5px;letter-spacing:1px;}
  .c-list span{font-size:15px;}
  .certs{padding:16px;border-radius:12px;}
  .certs .cap{font-size:11.5px;line-height:1.6;}

  /* ---- 下一页导流 ---- */
  .next{padding:0 20px;}
  .next a{padding:56px 6px;}
  .next a::before{left:6px;right:6px;}
  .next h2{font-size:clamp(26px,7.6vw,34px);gap:14px;letter-spacing:2px;}
  .next h2 svg{width:30px;height:30px;}
  .next .nx-k{font-size:11px;letter-spacing:3px;margin-bottom:12px;}
  .next p{font-size:13px;line-height:1.7;}

  /* ---- 页脚 ---- */
  footer{padding:40px 20px 30px;}
  .f-in{gap:24px;}
  .f-brand{font-size:17px;letter-spacing:2px;}
  .f-brand small{font-size:10.5px;letter-spacing:1px;line-height:1.7;}
  .f-nav{gap:18px 22px;font-size:13px;}
  .f-bottom{margin-top:24px;padding-top:16px;font-size:11.5px;flex-direction:column;gap:8px;}

  .note{font-size:11.5px;margin-top:22px;line-height:1.7;text-align:left;}
  .sec-head.center .note{text-align:center;}
}

/* 超小屏（≤420px）再收一档 */
@media (max-width:420px){
  .hero h1{font-size:clamp(24px,7vw,28px);}
  .hero{padding-top:118px;}
  .page-hero h1{font-size:25px;}
  .band .b{padding:20px 10px;}
  .band b{font-size:26px;}
  .band .b>span{font-size:10.8px;}
  .compare table{font-size:11.8px;}
  .compare th,.compare td{padding:10px 8px;}
  .proof .metrics{grid-template-columns:1fr 1fr;}
  .proof .metrics b{font-size:18px;}
  .brand .bt span{display:none;}
  .next a{padding:48px 4px;}
  .hl{min-height:240px;}
}

/* 移动端触摸优化 */
@media (hover:none){
  .card:hover,.engine:hover,.scene:hover,.center:hover,.hl:hover,.step:hover{transform:none;box-shadow:none;}
  .hl:hover .bg,.center:hover img,.split .pic:hover img{transform:none;}
  .nav-links a::after{display:none;}
}

/* 移动端抽屉遮罩与菜单按钮状态 */
/* 修复：.nav 整体 z-index:100，而遮罩是 105，会把整个抽屉（含菜单链接和关闭按钮）压在下面，
   导致手机上点菜单项只收起菜单、不跳转。抽屉打开时把 .nav 提到遮罩之上即可。 */
.nav-mask{position:fixed;inset:0;background:rgba(6,24,18,.55);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .3s;z-index:105;}
.nav-mask.on{opacity:1;pointer-events:auto;}
body.nav-open{overflow:hidden;}
body.nav-open .nav{z-index:110;}
.menu-btn{z-index:120;}
.nav-links{z-index:1;}
.menu-btn svg{transition:transform .3s;}
body.nav-open .menu-btn svg{stroke:#fff;}

/* ---------- PWA 安装提示 ---------- */
#pwaPill{
  position:fixed;right:20px;bottom:20px;bottom:calc(20px + env(safe-area-inset-bottom));
  z-index:150;display:flex;align-items:center;gap:12px;
  background:rgba(15,44,36,.96);backdrop-filter:blur(10px);
  border:1px solid rgba(233,200,122,.35);border-radius:14px;
  padding:12px 14px;max-width:calc(100vw - 40px);
  box-shadow:0 18px 44px rgba(6,24,18,.4);
  opacity:0;transform:translateY(16px);transition:opacity .4s ease,transform .4s ease;
}
#pwaPill.on{opacity:1;transform:none;}
#pwaPill img{width:40px;height:40px;border-radius:9px;flex:0 0 40px;}
#pwaPill .pp-txt{line-height:1.45;}
#pwaPill .pp-txt b{display:block;font-size:13.5px;color:#fff;letter-spacing:1px;}
#pwaPill .pp-txt span{font-size:11.5px;color:rgba(255,255,255,.62);letter-spacing:.5px;}
#pwaPill .pp-install{
  border:none;border-radius:99px;padding:9px 18px;margin-left:4px;
  background:var(--gold);color:#fff;font-size:13px;letter-spacing:2px;
  cursor:pointer;transition:.25s;white-space:nowrap;font-family:inherit;
}
#pwaPill .pp-install:hover{background:var(--gold-lt);}
#pwaPill .pp-close{
  position:absolute;top:4px;right:8px;border:none;background:none;
  color:rgba(255,255,255,.45);font-size:17px;cursor:pointer;line-height:1;padding:4px;
}
@media (max-width:420px){
  #pwaPill{right:12px;left:12px;bottom:calc(14px + env(safe-area-inset-bottom));max-width:none;}
  #pwaPill .pp-txt span{display:none;}
}
.nav.on-dark:not(.solid) .nav-cta{color:#fff;}
.nav.on-dark:not(.solid) .nav-cta:hover{background:var(--gold);border-color:var(--gold);}
.f-bottom a.icp{color:rgba(255,255,255,.5);text-decoration:none;transition:color .25s;}
.f-bottom a.icp:hover{color:var(--gold);}
.values{background:var(--bg);padding:84px 6vw;}
.values .v-grid{max-width:1240px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.values .v{background:#fff;border:1px solid rgba(26,77,58,.14);border-radius:12px;padding:36px 32px;transition:transform .3s,box-shadow .3s;}
.values .v:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(15,44,36,.10);}
.values .v b{font-family:var(--serif);font-weight:600;font-size:30px;color:var(--green-deep);letter-spacing:8px;display:block;}
.values .v b::after{content:"";display:block;width:34px;height:3px;background:var(--gold);margin-top:16px;}
.values .v p{margin-top:16px;color:var(--ink2);font-size:14.5px;line-height:1.9;}
@media (max-width:800px){.values{padding:64px 5vw;}.values .v-grid{grid-template-columns:1fr;gap:16px;}}