.ph{background:#fff;color:var(--text);min-height:100dvh}.ph-head{position:sticky;top:0;z-index:10;background:#ffffffe6;backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.ph-head-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}.ph-logo{display:inline-flex;align-items:center;gap:12px}.ph-logo img{height:34px;width:auto;display:block}.ph-logo-tag{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--red);padding:5px 10px;border-radius:999px;background:#fbe9ea}.ph-head-nav a{font-size:14px;font-weight:500;color:var(--text-dim);padding:8px 12px;border-radius:10px}.ph-head-right{display:flex;align-items:center;gap:12px}.ph-lang{display:inline-flex;padding:3px;border-radius:10px;background:var(--surface)}.ph-lang a{padding:6px 10px;border-radius:8px;font-size:13px;font-weight:600;color:var(--text-mut)}.ph-lang a[aria-current=page]{background:#fff;color:var(--text);box-shadow:0 1px 2px #081c3b1f;cursor:default}.ph-hero{padding-block:72px 56px;background:linear-gradient(180deg,#fff,#f7f9fd);border-bottom:1px solid var(--line)}.ph-eyebrow{font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--red);margin-bottom:14px}.ph-eyebrow .zh{text-transform:none;letter-spacing:0;font-size:15px}.ph-hub-link{margin-bottom:14px;font-size:14px}.ph-hub-link a{color:var(--text-dim);text-decoration:underline;text-underline-offset:3px}.ph-h1{font-size:56px;line-height:1.08;letter-spacing:-.03em;font-weight:600;text-wrap:balance;max-width:18ch}.ph-h1 .dim,.ph-h2 .dim{color:var(--text-dim)}.ph-lede{margin-top:20px;font-size:18px;line-height:1.55;color:var(--text-mut);max-width:62ch}.ph-section{padding-block:80px}.ph-sh{margin-bottom:32px}.ph-sh-k{font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--red);margin-bottom:14px}.ph-sh-k span{color:var(--text-dim);margin-right:8px}.ph-h2{font-size:40px;line-height:1.12;letter-spacing:-.02em;font-weight:600}.ph-sh-lede{margin-top:16px;font-size:17px;line-height:1.55;color:var(--text-mut);max-width:68ch}.ph-py-toggle{font:inherit;font-size:14px;font-weight:600;color:var(--red);background:none;border:0;padding:0;margin:0 0 28px;cursor:pointer;text-decoration:underline;text-underline-offset:3px}.ph-silent{margin-bottom:20px;font-size:15px;color:var(--text-mut)}.ph-group+.ph-group{margin-top:48px}.ph-group-h{font-size:13px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--red);margin:0 0 8px}.ph-rows{list-style:none;margin:0;padding:0}.ph-row{display:grid;grid-template-columns:auto 1fr;gap:8px 20px;padding:22px 0;border-bottom:1px solid var(--line);transition:background .2s var(--ease)}.ph-row:hover{background:linear-gradient(90deg,transparent,rgba(247,249,253,.9) 8%,transparent)}.ph-play{justify-self:start;align-self:start;margin-top:6px;font:inherit;font-size:13px;font-weight:600;color:var(--red);background:none;border:0;padding:0;cursor:pointer;text-decoration:underline;text-underline-offset:3px;transition:color .2s var(--ease)}.ph-play.is-on{color:var(--text-dim);text-decoration:none}.ph-body{display:grid;gap:6px;min-width:0}.ph-zh{margin:0;font-family:var(--font-zh);font-size:26px;line-height:1.35;font-weight:600}.ph-py{margin:0;font-size:16px;line-height:1.45;color:var(--text-dim)}.ph-m{margin:0;font-size:16px;line-height:1.5;color:var(--text-mut)}.ph-note{margin:4px 0 0;font-size:14px;line-height:1.45;color:var(--text-mut)}.ph-faq{display:grid;gap:26px;max-width:800px}.ph-faq-item dt{font-weight:600;font-size:17px}.ph-faq-item dd{margin:6px 0 0;font-size:16px;line-height:1.55;color:var(--text-mut)}.ph-hub-list{list-style:none;margin:0;padding:0}.ph-hub-row{display:block;padding:28px 0;border-bottom:1px solid var(--line);color:inherit;transition:background .2s var(--ease)}.ph-hub-row:hover{background:linear-gradient(90deg,transparent,rgba(247,249,253,.9) 6%,transparent)}.ph-hub-k{margin:0 0 10px;font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--red)}.ph-hub-k .zh{text-transform:none;letter-spacing:0;font-size:15px}.ph-hub-title{margin:0;font-size:28px;line-height:1.2;letter-spacing:-.02em;font-weight:600}.ph-hub-lede{margin:10px 0 0;font-size:16px;line-height:1.5;color:var(--text-mut);max-width:62ch}.ph-hub-open{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--red);text-decoration:underline;text-underline-offset:3px}@media (max-width: 1100px){.ph-h1{font-size:44px}.ph-head-nav{display:none}}@media (max-width: 860px){.ph-hero,.ph-section{padding-block:56px}.ph-h2{font-size:32px}.ph-hub-title{font-size:24px}}@media (max-width: 560px){.ph-h1{font-size:34px}.ph-logo-tag{display:none}.ph-zh{font-size:22px}.ph-row{gap:6px 14px}}@media (prefers-reduced-motion: reduce){.ph-row,.ph-hub-row,.ph-play{transition:none}}