:root{--primary-red: #b64732;--primary-red-hover: #933622;--accent-red: #b64732;--navy-ink: #3f382f;--bg-color: #fbf7ee;--surface-color: #fffaf0;--text-color: #3f382f;--muted-text: #786b5d;--brand-line: #dfd3c1;--editorial-font: "Songti SC", "Noto Serif CJK SC", "STSong", Georgia, serif}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:PingFang SC,Microsoft YaHei,Segoe UI,sans-serif;background:var(--bg-color);color:var(--text-color);line-height:1.6}::selection{background:#edc3a6;color:#542b1e}a:focus-visible,button:focus-visible{outline:2px solid var(--accent-red);outline-offset:5px}button{font:inherit}.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;justify-content:space-between;align-items:center;padding:.9rem max(2rem,(100vw - 1240px) / 2);gap:1.5rem;background:#fbf7eef5;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--brand-line);position:sticky;top:0;z-index:1000}.app-header .logo a{display:flex;align-items:center;gap:.7rem;color:var(--accent-red);font-family:Trebuchet MS,sans-serif;font-size:1.65rem;font-weight:700;letter-spacing:-.04em;text-decoration:none;white-space:nowrap}.app-header .brand-wordmark small{display:block;color:var(--muted-text);font-family:PingFang SC,sans-serif;font-size:.59rem;font-weight:400;letter-spacing:.15em}.app-header .main-nav{display:flex;flex-wrap:wrap;gap:.5rem 1.2rem}.app-header .main-nav a{text-decoration:none;color:var(--navy-ink);font-weight:600;font-size:.86rem;white-space:nowrap;transition:color .3s}.app-header .main-nav a:hover,.app-header .main-nav a.active{color:var(--primary-red)}.app-header .auth-buttons{display:flex;gap:.5rem}.app-header .auth-buttons button{padding:.5rem 1.2rem;border:none;border-radius:4px 4px 12px;font-weight:700;cursor:pointer;transition:all .3s}.app-header .auth-buttons button.login-btn{background:transparent;color:var(--navy-ink);border:1px solid var(--brand-line)}.app-header .auth-buttons button.register-btn{background:var(--primary-red);color:#fff}.app-header .auth-buttons button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #633e1e15}.app-content{flex:1;padding:0 2rem 2rem;max-width:1304px;margin:0 auto;width:100%}.app-footer{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:2rem max(2rem,(100vw - 1240px) / 2);border-top:1px solid var(--brand-line);color:var(--muted-text);font-size:.7rem}.footer-brand{color:var(--accent-red);font:600 1.3rem Trebuchet MS,sans-serif}.footer-brand span{display:block;margin-top:.6rem;font:.75rem PingFang SC,sans-serif;color:var(--muted-text)}@media(max-width:1200px){.app-header{flex-wrap:wrap;gap:.7rem;padding:.7rem 1.25rem}.app-header .main-nav{order:3;width:100%;justify-content:center;gap:.5rem 1.5rem;padding-top:.3rem}.app-header .auth-buttons button{padding:.4rem .85rem;font-size:.75rem}.app-header .logo app-brand-mark{width:38px}.app-header .logo a{font-size:1.35rem;gap:.45rem}.app-header .brand-wordmark small{font-size:.51rem}.app-content{padding:0 1.25rem 1.5rem}.app-footer{flex-direction:column;align-items:start}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.app-header .auth-buttons button{transition:none}.app-header .auth-buttons button:hover{transform:none}}