:root{--ink:#173446;--ink-2:#274055;--paper:#fffefb;--gold:#99733c;--gold-2:#84632f;--gold-soft:#e7d3a6;--green:#216a58;--line:#dce4e8;--muted:#5a7180}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-snap-type:y mandatory}body{margin:0;background:#eef2f3;color:var(--ink);font:15px/1.85 'Microsoft YaHei','PingFang SC',sans-serif}
button,input,select{font:inherit}button{cursor:pointer;border:0}a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin:0}h1,h2,h3{font-family:'Noto Serif SC','Songti SC','SimSun',serif;font-weight:500}
button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid #a77839;outline-offset:4px}
main{max-width:780px;margin:auto;background:var(--paper);box-shadow:0 10px 60px #17344612}
.page{min-height:100vh;min-height:100svh;min-height:100dvh;scroll-snap-align:start;scroll-snap-stop:always;display:flex;flex-direction:column}
.content{padding:42px 34px;border-bottom:1px solid var(--line)}
.kicker{font-size:12px;letter-spacing:3px;color:var(--gold);margin:0 0 16px}
.gold{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--gold);color:#fff;border-radius:6px;padding:13px 24px;font-size:15px;font-weight:600;letter-spacing:1px}
.gold:hover{background:var(--gold-2)}.gold.wide{width:100%}
.text{background:none;color:var(--green);padding:6px 0;font-size:14px;border-bottom:1px solid var(--green);border-radius:0}
.text-link{background:none;color:var(--gold-2);padding:0;font-size:13px;border-bottom:1px dashed var(--gold);border-radius:0;letter-spacing:.5px}
.share-tip{font-size:12.5px;line-height:1.65;color:var(--ink-2);background:linear-gradient(180deg,#f5f2e9,#fffefb);border:1px solid #99733c44;border-radius:10px;padding:11px 13px;margin:16px 0 8px}
.share-tip b{color:var(--gold-2);font-weight:600}


/* ===== HERO（视频轮播封面） ===== */
.hero{position:relative;color:#f3ece0;overflow:hidden;padding:58px 34px 84px}
.hero-video-wrap{position:absolute;inset:0;z-index:0;background:#0f2733}
.hero-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center top;background:#0f2733;z-index:0}
.hero-video-wrap video{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;background:transparent}
#hero-video-b{position:absolute;inset:0;z-index:2;opacity:0}
.hero-shade{position:absolute;inset:0;background:linear-gradient(180deg,#16313fb8 0%,#16313f26 42%,#16313fe0 100%)}
.hero-dots{position:absolute;bottom:104px;left:0;right:0;display:flex;gap:8px;justify-content:center;z-index:3}
.hero-dots button{width:8px;height:8px;border-radius:4px;background:#ffffff59;padding:0;transition:all .3s}
.hero-dots button.active{background:var(--gold-soft);width:22px}
.scroll-hint{position:absolute;bottom:72px;left:0;right:0;text-align:center;font-size:11px;letter-spacing:3px;color:#e8dcc0;z-index:3;opacity:.85;animation:bob 1.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}
nav{position:absolute;top:0;left:0;right:0;z-index:5;display:flex;justify-content:flex-end;padding:18px 20px}
#music{border:1px solid #ffffff50;background:#ffffff12;color:#f3ece0;border-radius:40px;padding:8px 14px;font-size:12px;letter-spacing:1px}
.hero-inner{position:relative;z-index:2;display:grid;place-items:center;min-height:62vh}
.hero-title{font-family:'Noto Serif SC','Songti SC','SimSun',serif;font-weight:500;font-size:clamp(58px,19vw,120px);letter-spacing:14px;text-indent:14px;color:#f6efe2;text-shadow:0 4px 30px #00000055;margin:0}

/* ===== 邀请信（信笺卡片：金线双框 + 海报隐底） ===== */
.letter{background:linear-gradient(180deg,#f5f2e9 0%,#fffefb 40%,#f5f2e9 100%);display:flex;padding:30px 22px}
.letter-card{position:relative;flex:1;display:flex;flex-direction:column;justify-content:center;border:1px solid #99733c55;padding:40px 26px 32px;overflow:hidden;background:#fffefbcc}
.letter-card::before{content:"";position:absolute;inset:6px;border:1px solid #99733c26;pointer-events:none}
.letter-bg{position:absolute;left:0;right:0;bottom:0;height:58%;background:url('assets/og.jpg') center 26%/cover no-repeat;opacity:.15;-webkit-mask-image:linear-gradient(180deg,transparent 0%,#000 60%);mask-image:linear-gradient(180deg,transparent 0%,#000 60%)}
.letter-inner{position:relative;z-index:1;transform:translateY(-15mm)}
.letter .to-line{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin:4px 0 20px;font-size:21px}
.to-label{font-family:'Noto Serif SC',serif;color:var(--ink)}
.to-suffix{font-family:'Noto Serif SC',serif;color:var(--ink-2);font-size:13px;letter-spacing:1px;align-self:flex-end;padding-bottom:3px}
@font-face{font-family:'SiteKaiTi';src:url('assets/fonts/kaiti.woff2') format('woff2');font-display:swap;font-weight:400;font-style:normal}
.guest-input{border:0;border-bottom:1.5px dashed var(--gold);background:transparent;font-family:'SiteKaiTi',serif;font-size:19px;color:var(--gold-2);min-width:120px;max-width:60%;padding:2px 6px;outline:none}
.guest-input::placeholder{color:#bcc6cb;font-size:16px;font-family:'Microsoft YaHei',sans-serif}
#copy-link{margin:2px 0 18px}
.letter .lead{font-size:16px;color:var(--ink-2);line-height:1.95;margin-bottom:14px;text-indent:2em}
.letter-body{font-size:15px;color:var(--muted);line-height:1.95;text-indent:2em}
.sign{margin-top:30px;text-align:right;color:var(--ink)}
.sign-org{font-family:'Noto Serif SC',serif;font-size:15px;letter-spacing:normal;color:var(--muted);margin-bottom:4px}
.sign-org-sub{color:var(--muted)}
.sign-date{font-size:15px;color:var(--muted);margin-bottom:14px}

/* ===== 详情（海报横幅 + 信息卡片 + 海报淡底） ===== */
.details{position:relative;overflow:hidden;background:#fbfaf5}
.details-bg{position:absolute;inset:0;background:url('assets/og.jpg') center/cover no-repeat;opacity:.07}
.details-inner{position:relative;z-index:1;display:flex;flex-direction:column;flex:1;justify-content:center}
.details-banner{position:relative;height:158px;border-radius:14px;overflow:hidden;margin:0 0 20px;box-shadow:0 12px 34px #1734462b}
.details-banner img{width:100%;height:100%;object-fit:cover;display:block}
.details-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#16313f0d 40%,#16313fa6 100%)}
.details-banner span{position:absolute;left:16px;bottom:12px;z-index:1;color:#f3ece0;font-size:12px;letter-spacing:3px}
.details article{display:grid;grid-template-columns:auto 1fr;gap:18px;padding:18px 18px 16px;margin-bottom:14px;background:#fffefbe6;border:1px solid var(--line);border-radius:14px;box-shadow:0 6px 22px #17344614}
.details article:last-child{margin-bottom:0}
.details .num{font-family:'Noto Serif SC',serif;font-size:30px;color:var(--gold);line-height:1;padding-top:2px}
.details label{font-size:12px;letter-spacing:2px;color:var(--muted);text-transform:uppercase}
.details h3{font-size:18px;line-height:1.5;margin:4px 0 6px}
.details p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:6px}

/* ===== 现场掠影（纵排） ===== */
.poster-list{display:flex;flex-direction:column;gap:16px}
.poster-list img{width:100%;border-radius:14px;box-shadow:0 10px 34px #17344622;cursor:zoom-in}

/* ===== 温馨提示 ===== */
.notes{position:relative;overflow:hidden;background:#fbfaf5}
.notes-video-wrap{position:relative;width:100%;max-width:560px;margin:0 auto 26px}
.notes-video{display:block;width:100%;border-radius:14px;background:#000;box-shadow:0 8px 26px #1734461f}
.notes::before{content:"";position:absolute;inset:0;background:url('assets/og.jpg') center/cover no-repeat;opacity:.07}
.notes>*{position:relative;z-index:1}
.notes details{background:#fffefbe6;border:1px solid var(--line);border-radius:14px;box-shadow:0 6px 22px #17344614;padding:4px 18px;margin-bottom:16px}
.notes summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:15px 0;font-size:15px;font-weight:500}
.notes summary::-webkit-details-marker{display:none}
.notes summary .no{font-family:'Noto Serif SC',serif;font-style:normal;font-size:16px;color:var(--gold);letter-spacing:2px}
.notes summary .q{flex:1}
.notes summary span.plus{color:var(--gold);font-size:18px}
.notes details[open] summary span.plus{transform:rotate(45deg);display:inline-block}
.notes p{font-size:14px;color:var(--muted);line-height:1.85;padding:0 0 15px}
.notes-end{margin-top:auto;text-align:center;padding-top:30px;padding-bottom:8px}
.notes-end::before{content:"";display:block;width:1px;height:36px;background:linear-gradient(180deg,transparent,var(--gold));margin:0 auto 12px}
.notes-end p{margin:0;padding:0;font-size:12px;letter-spacing:5px;text-indent:5px;color:var(--muted)}

/* ===== 结尾 + 页脚 ===== */
.closing{text-align:center}
.closing h2{font-size:30px;line-height:1.5;margin-bottom:22px}
footer{background:#16313f;color:#cdd9dd;padding:30px 34px;font-size:12px;line-height:1.9;text-align:left;margin:44px -34px -42px}
footer strong{display:block;color:#f3ece0;font-size:14px;letter-spacing:1px;margin-bottom:6px}
footer p{color:#9fb6c0}
footer .tech-support{display:flex;align-items:flex-start;gap:0}
footer .tech-label{flex:0 0 auto}
footer .tech-names{flex:1 1 auto;line-height:1.6}

/* ===== 底部固定栏 ===== */
.bottom{position:sticky;bottom:0;z-index:15;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 20px;background:#fffefbf2;border-top:1px solid var(--line);backdrop-filter:blur(6px)}
.bottom div small{display:block;font-size:10px;color:var(--muted);letter-spacing:1px}
.bottom div strong{font-family:'Noto Serif SC',serif;font-size:17px;color:var(--gold-2)}
.bottom .gold{padding:11px 20px;font-size:14px}

/* ===== 对话框 ===== */
dialog{width:min(420px,92vw);border:0;border-radius:18px;padding:26px 26px 22px;background:var(--paper);color:var(--ink);box-shadow:0 30px 90px #17344635}
dialog::backdrop{background:#17344655;backdrop-filter:blur(3px)}
dialog header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
dialog h2{font-size:23px;margin-bottom:8px}
dialog .muted{color:var(--muted);font-size:13px;margin-bottom:16px}
.close{background:none;color:var(--muted);font-size:26px;line-height:1;padding:0 4px}
#form label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}
#form select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff}
#form .fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}
#form input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff}
#form input:focus{border-color:var(--gold);outline:none}
.stepper{display:flex;align-items:center;gap:14px;margin:10px 0 4px}
.stepper button{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:20px;color:var(--ink)}
.stepper button:disabled{opacity:.4;cursor:not-allowed}
.stepper output{font-size:18px;min-width:24px;text-align:center}
.stepper span{font-size:13px;color:var(--muted)}
#error{color:#b3431f;font-size:13px;min-height:18px;margin:10px 0 0}
.ticket{margin:18px 0;padding:16px;border:1px solid var(--line);border-radius:12px;background:#faf8f2;text-align:center}
.ticket span{font-size:12px;color:var(--muted);letter-spacing:1px}
.ticket h3{font-size:22px;color:var(--gold-2);margin:8px 0}
.ticket p{font-size:14px;color:var(--ink-2);margin:0}
.ticket hr{border:0;border-top:1px dashed var(--line);margin:12px 0}
.ticket small{font-size:11px;color:var(--muted)}
.ticket strong{display:block;font-size:13px;letter-spacing:.5px;color:var(--ink);word-break:break-all;overflow-wrap:anywhere;line-height:1.6}
.success-mark{width:56px;height:56px;border-radius:50%;background:var(--green);color:#fff;display:grid;place-items:center;font-size:28px;margin:0 auto 14px}
#cancel{margin-top:14px;color:var(--muted);border-bottom:1px solid #ccc}

/* ===== 放大灯箱 ===== */
dialog#lightbox{background:#0000;border:0;padding:0;max-width:92vw;box-shadow:none}
dialog#lightbox img{max-width:92vw;max-height:88svh;border-radius:10px;display:block}
dialog#lightbox .close{position:fixed;top:14px;right:16px;color:#fff;font-size:30px;background:#00000055;border-radius:50%;width:40px;height:40px}

#link-url{width:100%;padding:11px 12px;border:1px dashed var(--gold);border-radius:8px;background:#faf8f2;font-size:13px;color:var(--gold-2)}

@media (max-width:520px){.content{padding:36px 22px}.letter{padding:22px 14px}.letter-card{padding:32px 18px 26px}.hero{padding:50px 22px 80px}footer{margin:40px -22px -36px;padding:26px 22px}#form .fields{grid-template-columns:1fr}.guest-input{max-width:50%}}