/*
 * 南京周全低碳科技有限公司企业官网
 * 视觉系统 V2：现代深绿科技风
 * —— 玻璃拟态导航 / 渐变光晕 / 大字排版 / 卡片悬浮动效
 * 类名与页面结构保持向后兼容，仅重写视觉层。
 */

/* ============ 设计变量 ============ */
:root{
  --green-950:#031f18;
  --green-900:#05291f;
  --green-850:#073528;
  --green-800:#0a4232;
  --green-700:#0e5a43;
  --green-600:#12805e;
  --green-500:#16a06f;
  --green-400:#2ec98c;
  --mint:#6ee7b7;
  --mint-soft:#a7f3d0;
  --green-200:#c9e8da;
  --green-100:#e3f3ec;
  --green-50:#f2faf6;
  --charcoal:#182420;
  --gray-900:#0f1a16;
  --gray-700:#3f4d47;
  --gray-600:#5c6b64;
  --gray-500:#93a29a;
  --gray-200:#e4ebe7;
  --gray-100:#f3f6f4;
  --white:#fff;
  --line:#dfe9e4;
  --shadow-sm:0 10px 30px rgba(4,42,32,.07);
  --shadow-md:0 24px 60px rgba(4,42,32,.13);
  --shadow-glow:0 12px 34px rgba(22,160,111,.32);
  --radius:18px;
  --radius-lg:26px;
  --container:1240px;
  --header-height:80px;
  --grad-brand:linear-gradient(135deg,var(--green-500),var(--green-800));
  --grad-deep:linear-gradient(140deg,var(--green-950) 0%,var(--green-800) 55%,var(--green-700) 100%);
  --grid-pattern:linear-gradient(rgba(110,231,183,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(110,231,183,.06) 1px,transparent 1px);
}

html{scroll-padding-top:calc(var(--header-height) + 24px)}
body{min-width:320px;color:var(--charcoal);background:var(--white);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC","Source Han Sans SC",Arial,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
body.menu-open{overflow:hidden}
::selection{color:var(--green-950);background:var(--mint)}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--gray-100)}
::-webkit-scrollbar-thumb{background:var(--green-200);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--green-400)}

.container{max-width:var(--container)}
.skip-link{position:fixed;top:12px;left:12px;z-index:9999;padding:10px 16px;color:var(--green-950);background:var(--mint);border-radius:10px;font-weight:700;transform:translateY(-150%);transition:transform .18s ease}
.skip-link:focus{transform:translateY(0)}

/* ============ 顶部导航：玻璃拟态 ============ */
.site-header{position:sticky;top:0;z-index:1000;height:var(--header-height);background:rgba(255,255,255,.78);border-bottom:1px solid rgba(223,233,228,.7);backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5)}
.site-header.is-scrolled{background:rgba(255,255,255,.92);box-shadow:0 12px 40px rgba(4,42,32,.1)}
.header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand-mark{display:grid;flex:0 0 auto;width:46px;height:46px;color:var(--white);background:var(--grad-brand);border-radius:13px;place-items:center;font-size:11px;font-weight:800;letter-spacing:.08em;box-shadow:0 6px 16px rgba(18,128,94,.28)}
.brand-text{display:flex;min-width:0;flex-direction:column;line-height:1.25}
.brand-text strong{overflow:hidden;background:linear-gradient(120deg,var(--green-900),var(--green-600));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:15px;text-overflow:ellipsis;white-space:nowrap}
.brand-text small{color:var(--gray-500);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.desktop-nav{display:flex;align-items:center;gap:4px;padding:5px;background:rgba(242,250,246,.7);border:1px solid rgba(223,233,228,.8);border-radius:999px}
.nav-link{position:relative;display:inline-flex;align-items:center;height:40px;padding:0 15px;color:var(--gray-700);border-radius:999px;font-size:14px;font-weight:600;transition:color .16s ease,background-color .16s ease,box-shadow .16s ease}
.nav-link::after{position:absolute;right:14px;bottom:4px;left:14px;height:2px;content:"";background:var(--grad-brand);border-radius:2px;transform:scaleX(0);transition:transform .18s ease}
.nav-link:hover,.nav-link.is-active{color:var(--green-700);background:var(--white);box-shadow:0 4px 14px rgba(18,128,94,.14)}
.nav-link.is-active{color:var(--green-800);font-weight:800}
.nav-link.is-active::after{transform:scaleX(1)}
.menu-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;padding:0;color:var(--green-800);border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.8)}
.menu-toggle-lines,.menu-toggle-lines::before,.menu-toggle-lines::after{display:block;width:20px;height:2px;content:"";background:currentColor;border-radius:2px;transition:transform .18s ease,opacity .18s ease}
.menu-toggle-lines{position:relative}
.menu-toggle-lines::before{position:absolute;top:-6px}.menu-toggle-lines::after{position:absolute;top:6px}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines{background:transparent}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::before{top:0;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::after{top:0;transform:rotate(-45deg)}
.mobile-nav{position:fixed;top:var(--header-height);right:0;left:0;z-index:999;display:none;max-height:calc(100vh - var(--header-height));padding:12px 20px 24px;overflow-y:auto;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:var(--shadow-md);backdrop-filter:blur(16px)}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:13px 14px;color:var(--gray-700);border-bottom:1px solid var(--gray-100);border-radius:10px;font-weight:600}
.mobile-nav a.is-active,.mobile-nav a:hover{color:var(--green-800);background:var(--green-50)}
.main-content{min-height:50vh}

/* ============ 区块骨架 ============ */
.section{padding:96px 0}
.section-sm{padding:68px 0}
.section-muted{position:relative;background:linear-gradient(180deg,var(--green-50),#fff)}
.section-dark{position:relative;color:var(--white);background:var(--grad-deep);overflow:hidden}
.section-dark::before{position:absolute;inset:0;content:"";background:var(--grid-pattern);background-size:44px 44px;opacity:.5;pointer-events:none}
.section-dark::after{position:absolute;top:-220px;right:-140px;width:520px;height:520px;content:"";background:radial-gradient(circle,rgba(46,201,140,.28),transparent 65%);border-radius:50%;pointer-events:none}
.section-dark>.container{position:relative;z-index:1}
.section-dark .section-title{color:var(--white)}
.section-dark .section-description{color:rgba(255,255,255,.75)}
.section-heading{max-width:780px;margin-bottom:48px}
.section-heading.is-center{margin-right:auto;margin-left:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;padding:6px 14px;color:var(--green-600);background:var(--green-50);border:1px solid var(--green-200);border-radius:999px;font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
.eyebrow::before{width:7px;height:7px;content:"";background:var(--green-500);border-radius:50%;box-shadow:0 0 0 4px rgba(22,160,111,.16)}
.section-dark .eyebrow{color:var(--mint-soft);background:rgba(110,231,183,.1);border-color:rgba(110,231,183,.25)}
.section-dark .eyebrow::before{background:var(--mint)}
.section-title{background:linear-gradient(120deg,var(--green-950) 30%,var(--green-600));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:clamp(30px,4vw,46px);font-weight:900;line-height:1.22;letter-spacing:-.02em}
.section-title-sm{font-size:clamp(24px,3vw,34px)}
.section-description{max-width:720px;margin-top:18px;color:var(--gray-600);font-size:17px}
.section-heading.is-center .section-description{margin-right:auto;margin-left:auto}
.section-action{margin-top:36px}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 26px;border:1px solid transparent;border-radius:14px;font-size:15px;font-weight:700;line-height:1;transition:transform .16s ease,box-shadow .16s ease,color .16s ease,background-color .16s ease,border-color .16s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{position:relative;color:var(--white);background:var(--grad-brand);box-shadow:var(--shadow-glow)}
.btn-primary:hover{box-shadow:0 18px 44px rgba(22,160,111,.42)}
.btn-secondary{color:var(--green-800);background:var(--white);border-color:var(--green-600);box-shadow:0 4px 14px rgba(18,128,94,.1)}
.btn-secondary:hover{color:var(--white);background:var(--green-700)}
.btn-light{color:var(--green-900);background:var(--white);box-shadow:0 8px 24px rgba(0,0,0,.18)}
.btn-outline-light{color:var(--white);border-color:rgba(255,255,255,.55);backdrop-filter:blur(4px)}
.btn-outline-light:hover{color:var(--green-900);background:var(--white)}
.btn-block{width:100%}
.arrow-link{display:inline-flex;align-items:center;gap:8px;color:var(--green-600);font-size:14px;font-weight:800}
.arrow-link::after{content:"→";transition:transform .16s ease}
.arrow-link:hover{color:var(--green-700)}
.arrow-link:hover::after{transform:translateX(5px)}
.content-note{margin-bottom:28px;padding:14px 18px;color:#5c4b17;background:#fff9e7;border:1px solid #f1df9b;border-radius:12px;font-size:14px}
.placeholder-text{color:var(--gray-500)}

/* ============ 网格与媒体 ============ */
.grid-2,.grid-3,.grid-4,.grid-5{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-5{grid-template-columns:repeat(5,minmax(0,1fr))}
.media-placeholder{position:relative;overflow:hidden;background:var(--green-100);border:1px solid var(--line);border-radius:var(--radius)}
.media-placeholder img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.media-16-9{aspect-ratio:16/9}
.media-4-3{aspect-ratio:4/3}
.media-3-4{aspect-ratio:3/4}

/* ============ 首页 Hero ============ */
.home-hero{position:relative;min-height:680px;overflow:hidden;color:var(--white);background:var(--green-950)}
.hero-slides{position:absolute;inset:0}
.hero-slide{position:absolute;inset:0;display:flex;visibility:hidden;align-items:center;opacity:0;transition:opacity .7s ease,visibility .7s ease}
.hero-slide.is-active{visibility:visible;opacity:1}
.hero-media,.hero-overlay{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-overlay{background:
  radial-gradient(ellipse 60% 50% at 8% 20%,rgba(22,160,111,.32),transparent 70%),
  linear-gradient(90deg,rgba(3,31,24,.95) 0%,rgba(3,31,24,.82) 42%,rgba(3,31,24,.32) 100%),
  linear-gradient(0deg,rgba(3,31,24,.55),transparent 55%)}
.hero-overlay::after{position:absolute;inset:0;content:"";background:var(--grid-pattern);background-size:56px 56px;opacity:.55}
.hero-content{position:relative;z-index:2;max-width:800px;padding-top:72px;padding-bottom:120px}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;margin-bottom:22px;padding:8px 16px;color:var(--mint-soft);background:rgba(110,231,183,.09);border:1px solid rgba(110,231,183,.28);border-radius:999px;font-size:13px;font-weight:700;letter-spacing:.1em;backdrop-filter:blur(6px)}
.hero-kicker::before{width:8px;height:8px;content:"";background:var(--mint);border-radius:50%;box-shadow:0 0 0 0 rgba(110,231,183,.55);animation:pulse-dot 2.2s infinite}
.hero-title{background:linear-gradient(115deg,#ffffff 40%,var(--mint-soft));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:clamp(38px,6vw,70px);font-weight:900;line-height:1.12;letter-spacing:-.035em;filter:drop-shadow(0 6px 30px rgba(0,0,0,.35))}
.hero-description{max-width:660px;margin-top:24px;color:rgba(255,255,255,.82);font-size:clamp(16px,2vw,19px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
/* 轮播切换时的入场动画 */
.hero-slide.is-active .hero-kicker{animation:fade-up .7s .05s both}
.hero-slide.is-active .hero-title{animation:fade-up .8s .15s both}
.hero-slide.is-active .hero-description{animation:fade-up .8s .28s both}
.hero-slide.is-active .hero-actions{animation:fade-up .8s .4s both}
.hero-controls{position:absolute;right:0;bottom:40px;left:0;z-index:4;display:flex;align-items:center;justify-content:space-between;pointer-events:none}
.carousel-arrow,.carousel-dots{pointer-events:auto}
.carousel-arrow{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;color:var(--white);border:1px solid rgba(255,255,255,.4);border-radius:50%;backdrop-filter:blur(6px);background:rgba(3,31,24,.3);transition:color .15s ease,background-color .15s ease,transform .15s ease}
.carousel-arrow:hover{color:var(--green-950);background:var(--white);transform:scale(1.05)}
.carousel-dots{display:flex;gap:9px;padding:9px 13px;background:rgba(3,31,24,.45);border:1px solid rgba(255,255,255,.14);border-radius:999px;backdrop-filter:blur(8px)}
.carousel-dot{width:9px;height:9px;padding:0;background:rgba(255,255,255,.4);border-radius:50%;transition:width .25s ease,background-color .25s ease}
.carousel-dot.is-active{width:30px;background:linear-gradient(90deg,var(--green-400),var(--mint));border-radius:999px}

/* ============ 合作品牌条 ============ */
.partner-strip{padding:40px 0;background:linear-gradient(180deg,#fff,var(--green-50));border-top:1px solid var(--gray-100);border-bottom:1px solid var(--gray-100)}
.partner-strip-label{margin-bottom:20px;color:var(--gray-500);font-size:13px;font-weight:700;letter-spacing:.14em;text-align:center}
.partner-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.partner-placeholder{display:grid;min-height:70px;padding:12px;color:var(--gray-500);background:var(--gray-100);border:1px dashed #c9d4cf;border-radius:12px;place-items:center;font-size:12px;text-align:center}
.partner-brand{display:grid;min-height:72px;padding:12px;color:var(--green-900);background:var(--white);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);place-items:center;font-size:15px;font-weight:800;letter-spacing:.06em;text-align:center}
.partner-brand:hover{border-color:var(--green-200);box-shadow:var(--shadow-md)}

/* ============ 企业概况 ============ */
.summary-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:60px;align-items:center}
.summary-copy p{margin-top:16px;color:var(--gray-600)}
.stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:30px}
.stat-card{position:relative;overflow:hidden;padding:22px 18px;background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease}
.stat-card::before{position:absolute;top:0;left:0;width:100%;height:3px;content:"";background:var(--grad-brand)}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.stat-card strong{display:block;background:linear-gradient(120deg,var(--green-700),var(--green-500));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:28px;font-weight:900;line-height:1.2}
.stat-card span{display:block;margin-top:8px;color:var(--gray-500);font-size:12px;letter-spacing:.04em}
.summary-visual{position:relative}
.summary-visual::before{position:absolute;top:-22px;right:-22px;width:46%;height:46%;content:"";background:linear-gradient(135deg,var(--mint),var(--green-200));border-radius:var(--radius-lg);opacity:.55}
.summary-visual::after{position:absolute;bottom:-18px;left:-18px;width:26%;height:26%;content:"";border:2px dashed var(--green-200);border-radius:18px;opacity:.8}
.summary-visual .media-placeholder{position:relative;z-index:1;box-shadow:var(--shadow-md)}
.summary-visual:hover .media-placeholder img{transform:scale(1.04)}

/* ============ 卡片体系 ============ */
.card{display:flex;min-width:0;height:100%;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.card:hover{border-color:var(--green-400);box-shadow:var(--shadow-md);transform:translateY(-6px)}
.card-body{display:flex;flex:1;flex-direction:column;padding:28px}
.card-title{color:var(--green-950);font-size:20px;font-weight:800;line-height:1.45}
.card-description{margin-top:12px;color:var(--gray-600);font-size:14px}
.card .arrow-link{margin-top:auto;padding-top:22px}
.icon-card{padding:30px 26px}
.icon-box{display:grid;width:54px;height:54px;margin-bottom:24px;color:var(--white);background:var(--grad-brand);border-radius:16px;place-items:center;font-size:14px;font-weight:900;box-shadow:0 8px 20px rgba(18,128,94,.25)}
.feature-card{min-height:190px;padding:28px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);backdrop-filter:blur(6px);transition:transform .2s ease,background-color .2s ease,border-color .2s ease}
.feature-card:hover{transform:translateY(-5px);background:rgba(255,255,255,.08);border-color:rgba(110,231,183,.4)}
.feature-index{background:linear-gradient(120deg,var(--mint),var(--green-400));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:38px;font-weight:900;line-height:1}
.feature-card h3{margin-top:16px;color:var(--white);font-size:19px;font-weight:800}
.feature-card p{margin-top:10px;color:rgba(255,255,255,.68);font-size:14px}

/* ============ 案例卡片 ============ */
.case-card{overflow:hidden}
.case-card .media-placeholder{border:0;border-bottom:1px solid var(--line);border-radius:0}
.case-card:hover .media-placeholder img{transform:scale(1.06)}
.case-card .card-body{padding:26px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.tag{display:inline-flex;align-items:center;min-height:28px;padding:4px 12px;color:var(--green-700);background:var(--green-50);border:1px solid var(--green-200);border-radius:999px;font-size:12px;font-weight:700}
.case-filter{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.filter-btn{min-height:42px;padding:0 18px;color:var(--gray-600);background:var(--white);border:1px solid var(--line);border-radius:999px;font-size:14px;font-weight:700;transition:all .16s ease}
.filter-btn:hover{color:var(--green-700);border-color:var(--green-400)}
.filter-btn.is-active{color:var(--white);background:var(--grad-brand);border-color:transparent;box-shadow:var(--shadow-glow)}
.case-card[hidden]{display:none}

/* ============ 内页 Hero ============ */
.page-hero{position:relative;overflow:hidden;color:var(--white);background:var(--grad-deep)}
.page-hero::before{position:absolute;inset:0;content:"";background:var(--grid-pattern);background-size:52px 52px;opacity:.5}
.page-hero::after{position:absolute;right:-130px;bottom:-190px;width:480px;height:480px;content:"";background:radial-gradient(circle,rgba(46,201,140,.24),transparent 62%);border:1px solid rgba(110,231,183,.14);border-radius:50%}
.page-hero-content{position:relative;z-index:1;max-width:820px;padding-top:80px;padding-bottom:80px}
.page-hero h1{font-size:clamp(34px,5vw,56px);font-weight:900;line-height:1.2;letter-spacing:-.03em}
.page-hero p{max-width:680px;margin-top:20px;color:rgba(255,255,255,.75);font-size:17px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:18px;color:rgba(255,255,255,.62);font-size:13px}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb span[aria-hidden="true"]{color:rgba(255,255,255,.32)}

/* ============ 关于页 ============ */
.split-section{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:56px;align-items:start}
.prose-block{color:var(--gray-600)}
.prose-block p+p{margin-top:16px}
.vision-card{position:relative;overflow:hidden;padding:32px;color:var(--white);background:var(--grad-deep);border-radius:var(--radius)}
.vision-card::before{position:absolute;top:-70px;right:-70px;width:200px;height:200px;content:"";background:radial-gradient(circle,rgba(110,231,183,.3),transparent 65%);border-radius:50%}
.vision-card h3{margin-top:14px;font-size:22px;font-weight:800}
.vision-card p{margin-top:12px;color:rgba(255,255,255,.75);font-size:14px}
.vision-label{color:var(--mint);font-size:12px;font-weight:800;letter-spacing:.14em}
.team-card{padding:22px}
.team-card h3{margin-top:18px;color:var(--green-950);font-size:18px;font-weight:800}
.team-card p{margin-top:8px;color:var(--gray-600);font-size:14px}
.gallery-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}
.gallery-grid .media-placeholder{height:100%;min-height:260px}

/* 时间线 */
.timeline{position:relative;margin-top:8px}
.timeline::before{position:absolute;top:12px;bottom:12px;left:109px;width:2px;content:"";background:linear-gradient(180deg,var(--green-400),var(--green-200))}
.timeline-item{position:relative;display:grid;grid-template-columns:86px 1fr;gap:46px;padding-bottom:38px}
.timeline-item:last-child{padding-bottom:0}
.timeline-year{padding-top:12px;background:linear-gradient(120deg,var(--green-700),var(--green-500));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:18px;font-weight:900;text-align:right}
.timeline-marker{position:absolute;top:17px;left:103px;width:15px;height:15px;background:var(--white);border:3px solid var(--green-500);border-radius:50%;box-shadow:0 0 0 5px rgba(22,160,111,.14)}
.timeline-content{padding:24px 26px;background:var(--white);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease}
.timeline-content:hover{transform:translateX(4px);box-shadow:var(--shadow-md)}
.timeline-content h3{color:var(--green-950);font-size:18px;font-weight:800}
.timeline-content p{margin-top:8px;color:var(--gray-600);font-size:14px}

/* ============ 解决方案 ============ */
.solution-card{position:relative;overflow:hidden}
.solution-card::before{position:absolute;top:0;left:0;width:100%;height:4px;content:"";background:var(--grad-brand);transform:scaleX(0);transform-origin:left;transition:transform .35s ease}
.solution-card:hover::before{transform:scaleX(1)}
.solution-detail{padding:104px 0;scroll-margin-top:calc(var(--header-height) + 24px)}
.solution-detail:nth-child(even){background:var(--green-50)}
.solution-detail-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:60px;align-items:center}
.solution-detail:nth-child(even) .solution-detail-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr)}
.solution-detail:nth-child(even) .solution-detail-media{order:2}
.solution-number{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;margin-bottom:20px;color:var(--white);background:var(--grad-brand);border-radius:16px;font-weight:900;box-shadow:var(--shadow-glow)}
.solution-copy h2{color:var(--green-950);font-size:clamp(26px,3vw,40px);font-weight:900;line-height:1.3}
.solution-copy>p{margin-top:16px;color:var(--gray-600)}
.service-list{display:grid;gap:12px;margin-top:26px}
.service-list li{position:relative;padding-left:28px;color:var(--gray-600);font-size:14px}
.service-list li::before{position:absolute;top:9px;left:0;width:9px;height:9px;content:"";background:var(--green-500);border-radius:3px;box-shadow:0 0 0 4px rgba(22,160,111,.12)}
.deliverables{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:30px}
.deliverable{padding:16px;background:var(--white);border:1px solid var(--line);border-radius:14px;transition:transform .16s ease,border-color .16s ease}
.deliverable:hover{transform:translateY(-3px);border-color:var(--green-400)}
.deliverable strong{display:block;color:var(--green-700);font-size:14px}
.deliverable span{display:block;margin-top:5px;color:var(--gray-500);font-size:12px}

/* ============ 案例详情 ============ */
.case-title-row{display:flex;gap:20px;align-items:flex-end;justify-content:space-between}
.meta-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;overflow:hidden;margin-top:32px;background:var(--line);border:1px solid var(--line);border-radius:16px}
.meta-item{padding:22px;background:var(--white)}
.meta-item span{display:block;color:var(--gray-500);font-size:12px}
.meta-item strong{display:block;margin-top:6px;color:var(--green-950);font-size:15px}
.detail-hero-image{margin-top:36px}
.detail-hero-image .media-placeholder{box-shadow:var(--shadow-md)}
.detail-section{padding:84px 0}
.detail-section+.detail-section{border-top:1px solid var(--gray-100)}
.detail-content{display:grid;grid-template-columns:260px minmax(0,1fr);gap:60px}
.detail-content>h2{color:var(--green-950);font-size:28px;font-weight:900;line-height:1.35}
.article-body h2{color:var(--green-950);font-size:26px;font-weight:900}
.article-body h3{margin-top:30px;color:var(--green-800);font-size:19px;font-weight:800}
.article-body p{margin-top:16px;color:var(--gray-600)}
.article-body ul{display:grid;gap:10px;margin-top:18px}
.article-body li{position:relative;padding-left:24px;color:var(--gray-600)}
.article-body li::before{position:absolute;top:11px;left:0;width:8px;height:8px;content:"";background:var(--green-500);border-radius:50%}
.result-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:24px}
.result-card{padding:26px;background:var(--green-50);border:1px solid var(--green-100);border-radius:16px;transition:transform .18s ease,box-shadow .18s ease}
.result-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.result-card strong{display:block;background:linear-gradient(120deg,var(--green-700),var(--green-500));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:24px;font-weight:900}
.result-card span{display:block;margin-top:7px;color:var(--gray-500);font-size:13px}
.detail-nav{display:flex;gap:16px;align-items:stretch;justify-content:space-between;margin-top:44px}
.detail-nav a{flex:1;padding:20px 22px;color:var(--gray-600);background:var(--white);border:1px solid var(--line);border-radius:14px;font-size:14px;font-weight:700;transition:color .16s ease,border-color .16s ease,box-shadow .16s ease}
.detail-nav a:last-child{text-align:right}
.detail-nav a:hover{color:var(--green-800);border-color:var(--green-400);box-shadow:var(--shadow-sm)}

/* ============ 资质与新闻 ============ */
.qualification-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.certificate-card{overflow:hidden}
.certificate-image{padding:18px;background:linear-gradient(160deg,var(--green-50),#fff);border-bottom:1px solid var(--line)}
.certificate-image .media-placeholder{border-radius:12px}
.certificate-label{padding:22px 24px 24px}
.certificate-label h3{color:var(--green-950);font-size:17px;font-weight:800}
.certificate-label p{margin-top:8px;color:var(--gray-500);font-size:13px}
.news-featured{position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center;padding:36px;background:var(--green-50);border:1px solid var(--green-100);border-radius:var(--radius-lg)}
.news-featured::before{position:absolute;top:-90px;right:-90px;width:260px;height:260px;content:"";background:radial-gradient(circle,rgba(22,160,111,.14),transparent 65%);border-radius:50%}
.news-featured h2{margin-top:16px;color:var(--green-950);font-size:clamp(24px,3vw,36px);font-weight:900;line-height:1.35}
.news-featured p{margin-top:14px;color:var(--gray-600)}
.news-list{display:grid;gap:0;border-top:1px solid var(--line)}
.news-item{display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:28px;align-items:center;padding:30px 0;border-bottom:1px solid var(--line);transition:padding-left .2s ease}
.news-item:hover{padding-left:10px}
.news-date{color:var(--green-600);font-size:14px;font-weight:800}
.news-content h3{color:var(--green-950);font-size:19px;font-weight:800}
.news-content h3 a:hover{color:var(--green-600)}
.news-content p{margin-top:8px;color:var(--gray-500);font-size:14px}
.news-arrow{display:grid;width:44px;height:44px;color:var(--green-700);background:var(--green-50);border:1px solid var(--green-100);border-radius:50%;place-items:center;transition:color .16s ease,background-color .16s ease,transform .16s ease}
.news-item:hover .news-arrow{color:var(--white);background:var(--grad-brand);border-color:transparent;transform:translateX(4px)}

/* ============ 联系页 ============ */
.contact-grid{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:48px;align-items:start}
.contact-card{position:relative;overflow:hidden;padding:30px;background:var(--grad-deep);border-radius:var(--radius-lg)}
.contact-card::before{position:absolute;inset:0;content:"";background:var(--grid-pattern);background-size:40px 40px;opacity:.4;pointer-events:none}
.contact-card::after{position:absolute;top:-80px;right:-80px;width:220px;height:220px;content:"";background:radial-gradient(circle,rgba(46,201,140,.3),transparent 62%);border-radius:50%}
.contact-card>*{position:relative;z-index:1}
.contact-card h2{color:var(--white);font-size:26px;font-weight:900}
.contact-card>p{margin-top:12px;color:rgba(255,255,255,.65);font-size:14px}
.info-list{display:grid;gap:24px;margin-top:32px}
.info-item{display:grid;grid-template-columns:42px 1fr;gap:14px}
.info-icon{display:grid;width:42px;height:42px;color:var(--mint);background:rgba(110,231,183,.1);border:1px solid rgba(110,231,183,.25);border-radius:13px;place-items:center;font-size:12px;font-weight:900}
.info-item dt{color:rgba(255,255,255,.5);font-size:12px}
.info-item dd{margin-top:4px;color:var(--white);font-size:15px;word-break:break-word}
.contact-form-wrap{padding:36px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.contact-form-wrap h2{color:var(--green-950);font-size:26px;font-weight:900}
.contact-form-wrap>p{margin-top:10px;color:var(--gray-500);font-size:14px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:28px}
.form-group{min-width:0}
.form-group.is-full{grid-column:1/-1}
.form-label{display:block;margin-bottom:8px;color:var(--gray-900);font-size:14px;font-weight:700}
.required{color:#e5484d}
.form-input,.form-textarea{width:100%;color:var(--charcoal);background:#fafcfa;border:1px solid var(--gray-200);border-radius:12px;transition:border-color .15s ease,box-shadow .15s ease,background-color .15s ease}
.form-input{min-height:50px;padding:0 14px}
.form-textarea{min-height:136px;padding:12px 14px;resize:vertical}
.form-input:focus,.form-textarea:focus{background:var(--white);border-color:var(--green-500);outline:0;box-shadow:0 0 0 4px rgba(22,160,111,.13)}
.form-input[aria-invalid="true"],.form-textarea[aria-invalid="true"]{border-color:#e5484d}
.field-error{display:none;margin-top:6px;color:#e5484d;font-size:12px}
.field-error.is-visible{display:block}
.form-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:24px}
.form-status{display:none;padding:12px 14px;color:var(--green-800);background:var(--green-50);border:1px solid var(--green-200);border-radius:12px;font-size:14px}
.form-status.is-visible{display:block}
.form-note{color:var(--gray-500);font-size:12px}
.map-block{margin-top:24px}
.map-block .media-placeholder{min-height:360px}

/* ============ CTA 横幅 ============ */
.cta-band{position:relative;overflow:hidden;padding:70px 0;color:var(--white);background:var(--grad-deep)}
.cta-band::before{position:absolute;inset:0;content:"";background:var(--grid-pattern);background-size:48px 48px;opacity:.45}
.cta-band::after{position:absolute;left:-120px;top:-140px;width:420px;height:420px;content:"";background:radial-gradient(circle,rgba(46,201,140,.28),transparent 62%);border-radius:50%}
.cta-inner{position:relative;z-index:1;display:flex;gap:32px;align-items:center;justify-content:space-between}
.cta-inner h2{font-size:clamp(25px,3vw,40px);font-weight:900;line-height:1.3}
.cta-inner p{max-width:720px;margin-top:12px;color:rgba(255,255,255,.7)}

/* ============ 页脚 ============ */
.site-footer{position:relative;color:rgba(255,255,255,.62);background:#02120d;overflow:hidden}
.site-footer::before{position:absolute;top:0;left:0;width:100%;height:1px;content:"";background:linear-gradient(90deg,transparent,var(--green-500),transparent)}
.footer-main{position:relative;padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:1.4fr .65fr .85fr 1fr;gap:44px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-mark{border:1px solid rgba(255,255,255,.14)}
.footer-brand .brand-text strong{color:var(--white);background:none;-webkit-background-clip:initial;background-clip:initial}
.footer-brand .brand-text small{color:rgba(255,255,255,.4)}
.footer-brand p{max-width:340px;font-size:13px}
.footer-title{margin-bottom:16px;color:var(--white);font-size:15px;font-weight:800}
.footer-links{display:grid;gap:9px}
.footer-links a{font-size:13px;transition:color .15s ease,padding-left .15s ease}
.footer-links a:hover{color:var(--mint);padding-left:4px}
.footer-contact{display:grid;gap:10px;font-size:13px}
.footer-bottom{padding:20px 0;border-top:1px solid rgba(255,255,255,.08)}
.footer-bottom-inner{display:flex;gap:20px;align-items:center;justify-content:space-between;font-size:12px}
.footer-bottom a:hover{color:var(--mint)}

/* ============ 404 ============ */
.error-page{position:relative;display:grid;min-height:calc(100vh - var(--header-height));padding:80px 0;color:var(--white);background:var(--grad-deep);overflow:hidden;place-items:center}
.error-page::before{position:absolute;inset:0;content:"";background:var(--grid-pattern);background-size:52px 52px;opacity:.5}
.error-code{position:relative;background:linear-gradient(115deg,var(--mint),var(--green-400));background-clip:text;-webkit-background-clip:text;color:transparent;font-size:clamp(80px,18vw,180px);font-weight:900;line-height:.9}
.error-page h1{position:relative;margin-top:22px;font-size:clamp(28px,4vw,44px);font-weight:900}
.error-page p{position:relative;max-width:620px;margin:18px auto 30px;color:rgba(255,255,255,.68)}

/* ============ 空状态与位置面板 ============ */
.empty-state{display:grid;justify-items:center;gap:12px;padding:64px 24px;text-align:center;background:var(--green-50);border:1px dashed var(--green-200);border-radius:var(--radius-lg)}
.empty-state h2{color:var(--green-950);font-size:24px;font-weight:900}
.empty-state p{max-width:520px;color:var(--gray-600)}
.empty-state-icon{display:grid;width:46px;height:46px;color:var(--white);background:var(--grad-brand);border-radius:50%;place-items:center;font-weight:900;box-shadow:var(--shadow-glow)}
.empty-state-compact{padding:38px 24px}
.location-panel{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:30px;background:var(--green-50);border:1px solid var(--green-100);border-radius:var(--radius-lg)}
.location-panel strong{color:var(--green-950);font-size:18px}
.location-panel p{margin-top:8px;color:var(--gray-600);font-size:14px}

/* ============ Logo 容器兼容 ============ */
.brand-mark.has-logo{padding:4px;background:var(--white);border:1px solid var(--line);overflow:hidden}
.brand-mark.has-logo img{width:100%;height:100%;object-fit:contain}
.site-footer .brand-mark.has-logo{background:var(--white);border-color:rgba(255,255,255,.18)}
.partner-card{display:grid;min-height:96px;padding:14px 20px;background:var(--white);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);place-items:center;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.partner-card img{width:auto;max-width:100%;height:auto;max-height:56px;object-fit:contain;filter:grayscale(1);opacity:.75;transition:filter .25s ease,opacity .25s ease}
.partner-card:hover{border-color:var(--green-200);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.partner-card:hover img{filter:grayscale(0);opacity:1}

/* ============ 深色区块内卡片覆盖 ============ */
.section-dark .feature-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius)}
.section-dark .feature-card h3{color:var(--white)}
.section-dark .feature-card p{color:rgba(255,255,255,.68)}
/* 新闻详情侧栏白底适配 */
.detail-content aside .info-item dt{color:var(--gray-500)}
.detail-content aside .info-item dd{color:var(--green-950)}
.detail-content aside .info-icon{color:var(--green-700);background:var(--green-50);border-color:var(--green-200)}

/* ============ 动画 ============ */
@keyframes fade-up{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse-dot{0%{box-shadow:0 0 0 0 rgba(110,231,183,.55)}70%{box-shadow:0 0 0 9px rgba(110,231,183,0)}100%{box-shadow:0 0 0 0 rgba(110,231,183,0)}}

/* ============ 响应式 ============ */
@media(max-width:1080px){
  .desktop-nav{display:none}
  .menu-toggle{display:inline-flex}
  .grid-4,.grid-5{grid-template-columns:repeat(2,minmax(0,1fr))}
  .summary-layout,.split-section,.solution-detail-grid,.contact-grid,.news-featured{grid-template-columns:1fr;gap:40px}
  .solution-detail:nth-child(even) .solution-detail-grid{grid-template-columns:1fr}
  .solution-detail:nth-child(even) .solution-detail-media{order:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .partner-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:820px){
  .section{padding:72px 0}
  .section-sm{padding:54px 0}
  .grid-3,.grid-4,.grid-5{grid-template-columns:repeat(2,minmax(0,1fr))}
  .home-hero{min-height:640px}
  .hero-content{padding-bottom:130px}
  .timeline::before{left:89px}
  .timeline-item{grid-template-columns:66px 1fr;gap:46px}
  .timeline-marker{left:82px}
  .qualification-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .detail-content{grid-template-columns:1fr;gap:28px}
  .cta-inner{align-items:flex-start;flex-direction:column}
  .news-item{grid-template-columns:110px minmax(0,1fr) auto;gap:18px}
}
@media(max-width:640px){
  :root{--header-height:70px}
  .container{padding-inline:18px}
  .brand-mark{width:40px;height:40px}
  .brand-text strong{max-width:190px;font-size:13px}
  .brand-text small{display:none}
  .section{padding:58px 0}
  .section-sm{padding:46px 0}
  .section-heading{margin-bottom:32px}
  .section-description{font-size:15px}
  .grid-2,.grid-3,.grid-4,.grid-5,.stat-grid,.deliverables,.meta-grid,.result-grid,.qualification-grid,.form-grid{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:1fr}
  .home-hero{min-height:600px}
  .hero-content{padding-top:44px;padding-bottom:118px}
  .hero-title{font-size:38px}
  .hero-description{font-size:15px}
  .hero-actions .btn{flex:1 1 160px}
  .hero-controls{bottom:24px}
  .partner-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .summary-visual::before,.summary-visual::after{display:none}
  .timeline::before{left:10px}
  .timeline-item{grid-template-columns:1fr;gap:10px;padding-left:34px}
  .timeline-year{padding-top:0;text-align:left}
  .timeline-marker{top:8px;left:4px}
  .solution-detail{padding:72px 0}
  .case-title-row{align-items:flex-start;flex-direction:column}
  .detail-nav{flex-direction:column}
  .detail-nav a:last-child{text-align:left}
  .news-featured{padding:24px}
  .news-item{grid-template-columns:1fr auto}
  .news-date{grid-column:1/-1}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom-inner{align-items:flex-start;flex-direction:column}
  .contact-card,.contact-form-wrap{padding:26px 20px}
  .form-actions{align-items:stretch;flex-direction:column}
  .form-actions .btn{width:100%}
  .location-panel{align-items:stretch;flex-direction:column}
  .location-panel .btn{width:100%}
  .empty-state{padding:44px 20px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}
}

/* 轮播图片容器铺满整个首屏 */
.hero-media .media-placeholder{width:100%;height:100%;border:0;border-radius:0;aspect-ratio:auto}
.hero-media .media-placeholder img{min-height:100%;object-fit:cover}