/* === v2.0 style.css === */
:root {
    --c-primary: #FF6A00;
    --c-primary-lt: #FF8C33;
    --c-primary-dk: #CC5500;
    --c-blue: #0066CC;
    --c-dark: #1A1A2E;
    --c-dark-deep: #0D1117;
    --c-gray-100: #FAFAFA;
    --c-gray-200: #F0F0F0;
    --c-gray-300: #E0E0E0;
    --c-gray-500: #999;
    --c-gray-700: #555;
    --c-gray-900: #222;
    --c-white: #FFF;
    --font: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
    --shadow-s: 0 2px 8px rgba(0,0,0,.06);
    --shadow-m: 0 4px 16px rgba(0,0,0,.1);
    --shadow-l: 0 8px 32px rgba(0,0,0,.14);
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 20px;
    --max-w: 1200px;
    --nav-h: 64px;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--c-gray-900);background:var(--c-white);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
button{font-family:var(--font);cursor:pointer}
input,select,textarea{font-family:var(--font)}
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-gray{background:var(--c-gray-100)}
.sec-header{text-align:center;margin-bottom:56px}
.sec-tag{display:inline-block;padding:5px 18px;background:rgba(255,106,0,.1);color:var(--c-primary);border-radius:50px;font-size:.82rem;font-weight:600;letter-spacing:.04em;margin-bottom:14px}
.sec-title{font-size:2.2rem;font-weight:700;color:var(--c-dark);margin-bottom:10px;letter-spacing:-.02em}
.sec-sub{font-size:1.05rem;color:var(--c-gray-500);max-width:560px;margin:0 auto}
.sub-heading{font-size:1.2rem;font-weight:700;color:var(--c-dark);margin-bottom:20px;text-align:center}
.btn{display:inline-flex;align-items:center;gap:7px;padding:12px 28px;border-radius:var(--r-sm);font-weight:600;font-size:.95rem;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:var(--c-primary);color:var(--c-white)}
.btn-primary:hover{background:var(--c-primary-dk);transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,106,0,.35)}
.btn-outline{background:transparent;color:var(--c-white);border:2px solid rgba(255,255,255,.45)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-lg{padding:14px 34px;font-size:1.05rem}
.btn-sm{padding:8px 16px;font-size:.85rem;border-radius:6px;background:var(--c-blue);color:#fff;white-space:nowrap}
.btn-sm:hover{background:#0055AA}
.btn-block{width:100%;justify-content:center;padding:14px;font-size:1rem;border-radius:var(--r-sm)}
.hidden{display:none!important}

/* 1. Navbar */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);background:rgba(26,26,46,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.07);transition:background .3s}
.navbar.scrolled{background:rgba(26,26,46,.95)}
.nav-container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:.85rem;color:var(--c-white)}
.brand-icon{color:var(--c-primary);font-size:1.3rem}
.nav-menu{display:flex;align-items:center;gap:22px}
.nav-link{font-size:.88rem;color:rgba(255,255,255,.72);transition:color .2s;position:relative;background:none;border:none;padding:0}
.nav-link:hover{color:#fff}
.nav-link::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--c-primary);transition:width .3s}
.nav-link:hover::after{width:100%}
.nav-cta{background:var(--c-primary)!important;color:#fff!important;padding:7px 20px!important;border-radius:50px!important}
.nav-cta::after{display:none}
.nav-cta:hover{background:var(--c-primary-lt)!important}
.nav-cta-work{background:linear-gradient(135deg,#0066CC,#0099FF)!important;color:#fff!important;padding:7px 20px!important;border-radius:50px!important;border:none!important;font-weight:600!important;letter-spacing:.5px}
.nav-cta-work::after{display:none}
.nav-cta-work:hover{background:linear-gradient(135deg,#0055AA,#0088EE)!important;transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,102,204,.35)}
.nav-mine{color:var(--c-primary-lt)!important;font-weight:600}
.nav-mine::after{display:none}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;z-index:1001}
.hamburger span{display:block;width:22px;height:2px;background:#fff;transition:all .3s}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* 2. Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(135deg,#0D1117 0%,#1A1A2E 40%,#16213E 100%)}
.particle-canvas{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 50%,transparent 40%,rgba(13,17,23,.6) 100%);pointer-events:none}
.hero-content{position:relative;z-index:2;text-align:center;padding-top:var(--nav-h)}
.hero-title{font-size:2.6rem;font-weight:800;color:#fff;line-height:1.2;margin-bottom:20px;white-space:nowrap;letter-spacing:.02em;background:linear-gradient(135deg,#FFF 0%,#CCD 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:fadeUp .7s ease}
.hero-slogan{font-size:1.55rem;color:rgba(255,255,255,.82);font-weight:600;margin-bottom:14px;animation:fadeUp .7s ease .1s both}
.hero-desc{font-size:1.15rem;color:rgba(255,255,255,.58);line-height:1.9;margin-bottom:40px;animation:fadeUp .7s ease .2s both}
.countdown{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:6px;animation:fadeUp .7s ease .3s both}
.cd-item{display:flex;flex-direction:column;align-items:center}
.cd-num{font-family:'SF Mono',Consolas,Monaco,monospace;font-size:2.6rem;font-weight:700;color:var(--c-primary);line-height:1;min-width:54px}
.cd-label{font-size:.75rem;color:rgba(255,255,255,.45);margin-top:3px}
.cd-sep{font-size:1.8rem;color:rgba(255,255,255,.25);margin-bottom:14px}
.cd-hint{font-size:.85rem;color:rgba(255,255,255,.38);margin-bottom:36px;animation:fadeUp .7s ease .35s both}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;animation:fadeUp .7s ease .4s both}
.scroll-hint{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:5px;color:rgba(255,255,255,.3);font-size:.72rem;animation:bounce 2s infinite}

/* 3. Horizontal Timeline */
.h-timeline{position:relative;padding:40px 0 20px}
.htl-track{position:absolute;top:58px;left:5%;right:5%;height:3px;background:linear-gradient(90deg,var(--c-primary),var(--c-blue),var(--c-primary));border-radius:2px}
.htl-nodes{display:flex;justify-content:space-between;position:relative;z-index:2}
.htl-node{display:flex;flex-direction:column;align-items:center;flex:1;text-align:center}
.htl-dot{width:18px;height:18px;background:var(--c-white);border:3px solid var(--c-gray-300);border-radius:50%;margin-bottom:16px;transition:all .3s}
.htl-node.active .htl-dot{background:var(--c-primary);border-color:var(--c-primary);box-shadow:0 0 0 6px rgba(255,106,0,.18);animation:pulse 2s infinite}
.htl-label h4{font-size:.92rem;color:var(--c-dark);margin-bottom:4px}
.htl-label p{font-size:.82rem;color:var(--c-gray-500);font-weight:500}
.htl-node.active .htl-label h4{color:var(--c-primary);font-weight:700}
.htl-node.active .htl-label p{color:var(--c-primary-dk)}

/* 4. Rules */
.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:48px}
.theme-card{padding:24px 20px;background:var(--c-white);border-radius:var(--r-md);box-shadow:var(--shadow-s);text-align:center;transition:all .3s}
.theme-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-l);background:#FFF9F5}
.theme-badge{display:inline-block;padding:4px 12px;background:var(--c-primary);color:#fff;border-radius:4px;font-size:.72rem;font-weight:700;margin-bottom:10px}
.theme-card h4{font-size:1rem;color:var(--c-dark);margin-bottom:6px}
.theme-card p{font-size:.85rem;color:var(--c-gray-700);line-height:1.6}
.tech-summary{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:700px;margin:0 auto 48px}
.tech-item{display:flex;align-items:flex-start;gap:14px;padding:20px;background:var(--c-white);border-radius:var(--r-md);box-shadow:var(--shadow-s)}
.tech-icon{font-size:1.6rem;flex-shrink:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(255,106,0,.08);border-radius:8px}
.tech-item strong{font-size:.92rem;color:var(--c-dark);display:block;margin-bottom:3px}
.tech-item p{font-size:.85rem;color:var(--c-gray-700);margin:0}
.pdf-download{text-align:center;padding-top:10px}
.pdf-btn{font-size:1.05rem;padding:16px 36px}
.pdf-note{margin-top:12px;font-size:.82rem;color:var(--c-gray-500)}
/* 4b. Materials List */
.materials-list{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:48px}
.material-item{display:flex;align-items:flex-start;gap:14px;padding:20px 18px;background:var(--c-white);border-radius:var(--r-md);box-shadow:var(--shadow-s);border-left:3px solid var(--c-primary);transition:all .3s}
.material-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-m)}
.material-num{font-family:'SF Mono',Consolas,monospace;font-size:1.6rem;font-weight:800;color:var(--c-primary);opacity:.35;line-height:1;flex-shrink:0}
.material-body strong{font-size:.9rem;color:var(--c-dark);display:block;margin-bottom:3px}
.material-body p{font-size:.8rem;color:var(--c-gray-700);margin:0;line-height:1.5}

/* 5. Awards */
.awards-row-main{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:24px}
.award-card{background:var(--c-white);border:1px solid var(--c-gray-200);border-radius:var(--r-md);padding:28px 22px;transition:all .3s;position:relative}
.award-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-l)}
.award-card.grand{border-color:var(--c-primary);background:linear-gradient(135deg,#FFF9F5,#FFF 50%)}
.award-badge{position:absolute;top:-11px;right:22px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-lt));color:#fff;padding:3px 14px;border-radius:50px;font-size:.72rem;font-weight:700}
.award-card h3{font-size:1.08rem;color:var(--c-dark);margin-bottom:3px}
.award-count{font-size:.82rem;color:var(--c-primary);font-weight:600;margin-bottom:14px}
.award-card ul li{font-size:.84rem;color:var(--c-gray-700);padding:3px 0;padding-left:14px;position:relative}
.award-card ul li::before{content:'\2726';position:absolute;left:0;color:var(--c-primary);font-size:.6rem;top:4px}
.awards-row-merit{margin-bottom:24px}
.award-merit-bar{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(135deg,#FCFCFE,#F5F5FB);border:1px solid #E8E8F0;border-radius:var(--r-md);padding:22px 32px;transition:all .3s}
.award-merit-bar:hover{box-shadow:var(--shadow-m)}
.merit-left{display:flex;align-items:center;gap:16px}
.merit-icon{font-size:2rem;flex-shrink:0}
.merit-left h3{font-size:1.05rem;color:var(--c-dark);margin-bottom:2px}
.merit-left .award-count{margin-bottom:0}
.merit-right{flex-shrink:0}
.merit-reward{display:inline-flex;align-items:center;gap:6px;padding:8px 22px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-lt));color:#fff;border-radius:50px;font-size:.88rem;font-weight:600}

/* 6. Videos */
.videos-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:22px}
.video-card{background:var(--c-white);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-s);transition:all .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-l)}
.video-thumb{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,#1A1A2E,#16213E);display:flex;align-items:center;justify-content:center}
.play-icon{opacity:.75;transition:all .3s}
.video-card:hover .play-icon{opacity:1;transform:scale(1.12)}
.video-dur{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.72);color:#fff;padding:2px 7px;border-radius:4px;font-size:.72rem;font-family:monospace}
.video-info{padding:16px}
.video-info h4{font-size:.95rem;color:var(--c-dark);margin-bottom:5px}
.video-info p{font-size:.82rem;color:var(--c-gray-500);line-height:1.5}

/* 7. Footer */
.footer{background:var(--c-dark-deep);padding:40px 0 24px;color:rgba(255,255,255,.5)}
.footer-inner{text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.footer-brand{display:flex;align-items:center;gap:7px;color:var(--c-white);font-weight:600;font-size:.95rem}
.footer-org{font-size:.85rem;color:rgba(255,255,255,.45)}
.footer-copy{font-size:.76rem;color:rgba(255,255,255,.3);padding-top:12px;border-top:1px solid rgba(255,255,255,.07);width:100%;text-align:center}

/* 8. Modal */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:2000;align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.modal-overlay.show{display:flex}
.modal{background:var(--c-white);border-radius:var(--r-lg);padding:40px 36px;max-width:460px;width:90%;max-height:85vh;overflow:hidden;position:relative;animation:fadeUp .3s ease;display:flex;flex-direction:column}
.modal-close{position:absolute;top:14px;right:18px;background:none;border:none;font-size:1.8rem;color:var(--c-gray-500);cursor:pointer;line-height:1;z-index:2}
.modal-close:hover{color:var(--c-dark)}
.modal-content{overflow-y:auto;flex:1;padding-right:4px}
.modal-content::-webkit-scrollbar{width:5px}
.modal-content::-webkit-scrollbar-track{background:transparent}
.modal-content::-webkit-scrollbar-thumb{background:var(--c-gray-300);border-radius:4px}
.modal-content::-webkit-scrollbar-thumb:hover{background:var(--c-gray-500)}
.modal-title{font-size:1.4rem;font-weight:700;color:var(--c-dark);margin-bottom:6px;text-align:center}
.modal-desc{font-size:.9rem;color:var(--c-gray-500);text-align:center;margin-bottom:24px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:.85rem;font-weight:600;color:var(--c-dark);margin-bottom:5px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:11px 14px;border:1px solid var(--c-gray-300);border-radius:var(--r-sm);font-size:.92rem;transition:border-color .2s;outline:none}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(255,106,0,.08)}
.form-group input[readonly]{background:var(--c-gray-100);color:var(--c-gray-500)}
.form-row{display:flex;gap:10px}
.form-row input{flex:1}
.form-hint{font-size:.75rem;color:var(--c-gray-500);margin-top:4px}
.success-icon{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-lt));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700}
/* Modal extras: switch link, mine view */
.modal-switch{text-align:center;font-size:.85rem;color:var(--c-gray-500);margin-top:16px}
.modal-switch a{color:var(--c-primary);font-weight:600;cursor:pointer}
.modal-switch a:hover{text-decoration:underline}
.mine-header{display:flex;align-items:center;gap:14px;padding:18px;background:var(--c-gray-100);border-radius:var(--r-md);margin-bottom:20px}
.mine-avatar{font-size:1.6rem;flex-shrink:0;width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-lt));color:#fff;border-radius:50%;font-weight:700}
.mine-info h3{font-size:1rem;color:var(--c-dark);font-weight:700;margin-bottom:2px}
.mine-tag{font-size:.78rem;color:var(--c-primary);font-weight:600}
.mine-reg-card{background:var(--c-gray-100);border-radius:var(--r-md);padding:16px 18px;margin-bottom:16px}
.mine-reg-card .reg-row{display:flex;justify-content:space-between;padding:7px 0;font-size:.88rem;border-bottom:1px solid var(--c-gray-200)}
.mine-reg-card .reg-row:last-child{border-bottom:none}
.mine-reg-card .reg-label{color:var(--c-gray-500);flex-shrink:0}
.mine-reg-card .reg-val{color:var(--c-dark);font-weight:500;text-align:right}
.mine-no-reg{text-align:center;padding:24px 0}
.mine-no-reg p{font-size:.9rem;color:var(--c-gray-500);margin-bottom:16px}

/* Upload Card */
.mine-upload-card{
    background:var(--c-gray-100);
    border:2px dashed var(--c-gray-300);
    border-radius:var(--r-md);
    padding:20px 18px 14px;
    margin-top:8px;
    text-align:center;
    transition:border-color .2s,background .2s;
}
.mine-upload-card:hover{border-color:var(--c-primary);background:#FFF9F5}
.mine-upload-card .upload-icon{font-size:1.6rem;margin-bottom:8px;opacity:.6}
.mine-upload-card .upload-hint{font-size:.75rem;color:var(--c-gray-500);margin-top:8px}

/* Work Modal */
.work-modal-wide{max-width:860px!important}
.work-modal-body{display:flex;gap:28px;margin-top:4px}
.work-modal-left{flex:1;min-width:0}
.work-modal-right{flex:0 0 260px;display:flex;flex-direction:column;justify-content:center;border-left:1px solid var(--c-gray-300);padding-left:28px}
.work-modal-icon{text-align:center;font-size:2.2rem;margin-bottom:6px}
.work-status-ok{text-align:center;color:#0a0;font-size:.88rem;font-weight:500;padding:10px;background:#f0fff0;border-radius:var(--r-sm);margin-bottom:12px}
.work-status-empty{text-align:center;color:var(--c-gray-500);font-size:.88rem;padding:10px;background:var(--c-gray-100);border-radius:var(--r-sm);margin-bottom:12px}
.btn-outline-gray{background:transparent;border:1px solid var(--c-gray-300);color:var(--c-gray-700)}
.btn-outline-gray:hover{background:var(--c-gray-100);border-color:var(--c-gray-500)}
.mt-12{margin-top:12px}

/* Animations */
@keyframes fadeUp{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeDown{from{opacity:0;transform:translateY(-18px)}to{opacity:1;transform:translateY(0)}}
@keyframes bounce{0%,20%,50%,80%,100%{transform:translateX(-50%) translateY(0)}40%{transform:translateX(-50%) translateY(-7px)}60%{transform:translateX(-50%) translateY(-3px)}}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,106,0,.4)}70%{box-shadow:0 0 0 10px rgba(255,106,0,0)}100%{box-shadow:0 0 0 0 rgba(255,106,0,0)}}
.fade-up{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* Responsive */
@media(max-width:1024px){
    .hero-title{font-size:2.1rem}
    .sec-title{font-size:1.9rem}
    .theme-grid{gap:14px}
    .htl-label h4{font-size:.82rem}
    .htl-label p{font-size:.75rem}
    .awards-row-main{grid-template-columns:repeat(2,1fr)}
    .materials-list{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    :root{--nav-h:58px}
    .section{padding:60px 0}
    .sec-title{font-size:1.6rem}
    .sec-header{margin-bottom:36px}
    .hamburger{display:flex}
    .nav-menu{position:fixed;top:0;right:-100%;width:72%;max-width:300px;height:100vh;background:rgba(26,26,46,.97);backdrop-filter:blur(18px);flex-direction:column;justify-content:center;gap:26px;transition:right .35s ease;padding:20px}
    .nav-menu.open{right:0}
    .nav-link{font-size:1rem}
    .hero-title{font-size:1.6rem;white-space:normal}
    .hero-slogan{font-size:1.2rem}
    .hero-desc{font-size:1rem}
    .cd-num{font-size:1.9rem;min-width:42px}
    .cd-sep{font-size:1.3rem}
    .hero-cta{flex-direction:column;align-items:center}
    .htl-nodes{flex-direction:column;gap:28px;padding-left:36px}
    .htl-track{top:0;bottom:0;left:22px;right:auto;width:3px;height:100%}
    .htl-node{flex-direction:row;align-items:center;text-align:left;gap:14px}
    .htl-dot{margin-bottom:0}
    .htl-label h4{font-size:.92rem}
    .theme-grid{grid-template-columns:1fr}
    .tech-summary{grid-template-columns:1fr}
    .materials-list{grid-template-columns:1fr}
    .awards-row-main{grid-template-columns:1fr}
    .award-merit-bar{flex-direction:column;text-align:center;gap:14px;padding:22px 20px}
    .merit-left{flex-direction:column;gap:8px}
    .videos-grid{grid-template-columns:1fr}
    .modal{padding:28px 22px}
    .work-modal-wide{max-width:95%!important}
    .work-modal-body{flex-direction:column;gap:16px}
    .work-modal-right{flex:none;border-left:none;padding-left:0;border-top:1px solid var(--c-gray-300);padding-top:16px}
}
@media(max-width:480px){
    .container{padding:0 16px}
    .hero-title{font-size:1.35rem}
    .countdown{gap:5px}
    .cd-num{font-size:1.5rem;min-width:34px}
    .nav-brand .brand-text{font-size:.72rem}
}