.pb{--pb-ink:#1f1a2e;--pb-mute:#665e78;--pb-line:#e6e1ee;--pb-soft:#f7f5fb;--pb-deep:#241a3d;--pb-gold:#f2d887;--tone:#5b36a8;--tone-bg:#f1ecfb;--tone-2:#8a6bd1;color:var(--pb-ink);padding-bottom:80px}.pb .tone-1,.pb.tone-1{--tone:#3f51b5;--tone-bg:#eceffb;--tone-2:#7986cb}.pb .tone-2,.pb.tone-2{--tone:#1f7ac2;--tone-bg:#e8f2fb;--tone-2:#64a8dc}.pb .tone-3,.pb.tone-3{--tone:#7442c8;--tone-bg:#f1eafb;--tone-2:#a584e0}.pb .tone-4,.pb.tone-4{--tone:#c9701a;--tone-bg:#fcf1e4;--tone-2:#e3a260}.pb .tone-5,.pb.tone-5{--tone:#c0392b;--tone-bg:#fbecea;--tone-2:#e07b70}.pb .tone-6,.pb.tone-6{--tone:#11897a;--tone-bg:#e5f5f2;--tone-2:#52b6a8}.pb .tone-7,.pb.tone-7{--tone:#3c8b3f;--tone-bg:#ebf6eb;--tone-2:#7cbc7e}.pb-wrap{width:min(1220px,100% - 32px);margin:0 auto}.pb-crumb{color:var(--pb-mute);flex-wrap:wrap;gap:6px;margin:22px 0 14px;font-size:14px;display:inline-flex}.pb-crumb a{color:var(--tone);font-weight:600;text-decoration:none}.pb-crumb a:hover{text-decoration:underline}.pb-kicker{letter-spacing:.03em;color:var(--tone);margin:0;font-size:12.5px;font-weight:700}.pb-foot{color:var(--pb-mute);text-align:center;margin:40px 0 0;font-size:13px;line-height:1.8}.pb-hero{color:#ece6f8;background:radial-gradient(55% 90% at 90% 0,#9b74d88c,#0000 60%),radial-gradient(40% 60% at 0 100%,#f2d8872e,#0000 60%),linear-gradient(150deg,#2e2150,#150f26);border-radius:30px;grid-template-columns:minmax(0,1.5fr) auto;align-items:center;gap:30px;padding:clamp(24px,4vw,46px);display:grid;box-shadow:0 34px 70px -40px #1c1234d9}.pb-hero .pb-kicker{color:var(--pb-gold)}.pb-hero h1{color:#fff;margin:10px 0 12px;font-size:clamp(30px,4.6vw,48px);line-height:1.2}.pb-hero h1 small{color:var(--pb-gold);margin-top:8px;font-size:clamp(17px,2vw,21px);font-weight:600;display:block}.pb-hero-copy>p{color:#d6cced;max-width:640px;margin:0;font-size:15.5px;line-height:1.9}.pb-stats{flex-wrap:wrap;gap:10px;margin:22px 0 0;display:flex}.pb-stats div{background:#ffffff12;border:1px solid #ffffff21;border-radius:16px;min-width:104px;padding:11px 16px}.pb-stats dt{color:#b8abd4;font-size:12px}.pb-stats dd{color:#fff;margin:2px 0 0;font-size:26px;font-weight:800}.pb-stats dd small{color:#cfc3ea;font-size:13px;font-weight:600}.pb-ring-box{justify-items:center;gap:14px;display:grid}.pb-ring{width:170px;height:170px}.pb-ring-bg{fill:none;stroke:#ffffff1f;stroke-width:10px}.pb-ring-fg{fill:none;stroke:var(--pb-gold);stroke-width:10px;stroke-linecap:round;transition:stroke-dasharray .8s}.pb-ring-num{fill:#fff;font-size:24px;font-weight:800}.pb-ring-cap{fill:#cfc3ea;font-size:10px;font-weight:600}.pb-resume{text-align:center;color:#2c2140;background:var(--pb-gold);border-radius:16px;gap:2px;max-width:250px;padding:12px 18px;text-decoration:none;transition:transform .15s;display:grid;box-shadow:0 12px 26px -14px #f2d887e6}.pb-resume:hover{transform:translateY(-2px)}.pb-resume small{color:#6d5a1a;font-size:12px;font-weight:700}.pb-resume b{font-size:14.5px;line-height:1.5}.pb-partnav{scrollbar-width:thin;gap:8px;margin:22px 0 8px;padding:4px 2px 10px;display:flex;overflow-x:auto}.pb-partnav a{border:1px solid var(--pb-line);color:var(--pb-ink);background:#fff;border-radius:14px;flex:none;align-items:center;gap:8px;padding:9px 14px;font-size:14px;font-weight:700;text-decoration:none;transition:border-color .15s,background .15s;display:flex}.pb-partnav a:hover{border-color:var(--tone);background:var(--tone-bg)}.pb-partnav i{font-style:normal}.pb-partnav small{color:var(--tone);font-size:11.5px;font-weight:600;display:block}.pb-part{margin-top:34px;scroll-margin-top:104px}.pb-part-head{background:var(--tone-bg);border:1px solid color-mix(in srgb, var(--tone) 22%, transparent);border-radius:24px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:6px 20px;padding:22px 24px;display:grid}.pb-part-no{background:var(--tone);color:#fff;width:74px;height:74px;box-shadow:0 12px 24px -14px var(--tone);border-radius:22px;place-items:center;font-size:22px;line-height:1;display:grid}.pb-part-no b{margin-top:2px;font-size:22px}.pb-part-head h2{margin:4px 0;font-size:clamp(21px,2.6vw,27px)}.pb-part-head h2 small{color:var(--tone);font-size:15px;font-weight:600}.pb-part-head p:last-child{color:#4d4560;margin:0;line-height:1.8}.pb-part-meter{background:#fffc;border-radius:99px;grid-column:1/-1;height:6px;margin-top:8px;display:block;overflow:hidden}.pb-part-meter i{border-radius:inherit;background:var(--tone);height:100%;transition:width .5s;display:block}.pb-cards{grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px;margin:14px 0 0;padding:0;list-style:none;display:grid}.pb-card{border:1px solid var(--pb-line);height:100%;color:var(--pb-ink);background:#fff;border-radius:20px;grid-template-rows:auto auto 1fr auto;gap:6px;padding:18px 18px 16px;text-decoration:none;transition:transform .18s,box-shadow .18s,border-color .18s;display:grid;position:relative;overflow:hidden}.pb-card:before{content:"";background:var(--tone);opacity:.85;height:4px;position:absolute;inset:0 0 auto}.pb-card:hover{border-color:var(--tone-2);transform:translateY(-3px);box-shadow:0 18px 34px -24px #28185099}.pb-card-no{color:color-mix(in srgb, var(--tone) 35%, #fff);font-size:28px;font-weight:800;line-height:1}.pb-card-title{gap:2px;font-size:16.5px;font-weight:800;line-height:1.45;display:grid}.pb-card-title small{color:var(--tone);font-size:13px;font-weight:600}.pb-card-sum{color:var(--pb-mute);-webkit-line-clamp:3;-webkit-box-orient:vertical;font-size:13.5px;line-height:1.7;display:-webkit-box;overflow:hidden}.pb-card-foot{color:var(--pb-mute);justify-content:space-between;align-items:center;margin-top:4px;font-size:12.5px;font-weight:600;display:flex}.pb-tick{color:#fff;background:#1f8a5b;border-radius:50%;place-items:center;width:22px;height:22px;margin-left:6px;font-size:12px;font-weight:800;display:inline-grid}.pb-bar{z-index:60;pointer-events:none;background:0 0;height:4px;position:fixed;top:0;left:0;right:0}.pb-bar i{background:linear-gradient(90deg, var(--tone), var(--tone-2));border-radius:0 4px 4px 0;height:100%;transition:width .1s linear;display:block}.pb-ch-head{background:linear-gradient(135deg, var(--tone-bg), #fff 70%);border:1px solid color-mix(in srgb, var(--tone) 20%, transparent);border-radius:28px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:24px;padding:clamp(22px,3.6vw,38px);display:grid}.pb-ch-no{background:var(--tone);color:#fff;width:104px;height:104px;box-shadow:0 18px 34px -20px var(--tone);border-radius:28px;align-content:center;place-items:center;font-size:40px;font-weight:800;line-height:1;display:grid}.pb-ch-no small{opacity:.85;margin-bottom:4px;font-size:12px;font-weight:700}.pb-ch-head h1{margin:6px 0 8px;font-size:clamp(26px,3.6vw,38px);line-height:1.3}.pb-ch-head h1 small{color:var(--tone);margin-top:6px;font-size:clamp(16px,1.8vw,19px);font-weight:700;display:block}.pb-lead{color:#4d4560;max-width:760px;margin:0;font-size:16px;line-height:1.9}.pb-meta{flex-wrap:wrap;gap:8px;margin:16px 0 0;padding:0;list-style:none;display:flex}.pb-meta li{border:1px solid var(--pb-line);color:#4d4560;background:#fff;border-radius:99px;padding:6px 12px;font-size:13px;font-weight:600}.pb-layout{grid-template-columns:270px minmax(0,1fr);align-items:start;gap:36px;margin-top:28px;display:grid}.pb-side{scrollbar-width:thin;gap:12px;max-height:calc(100vh - 124px);display:grid;position:sticky;top:104px;overflow:auto}.pb-side-box{border:1px solid var(--pb-line);background:#fff;border-radius:20px;padding:16px}.pb-side-box summary{cursor:pointer;color:var(--tone);font-size:13px;font-weight:800;list-style:none}.pb-side-box summary::-webkit-details-marker{display:none}.pb-side-box summary:after{content:"▾";float:right;color:var(--pb-mute)}.pb-side-box ol{gap:2px;margin:10px 0 0;padding:0;list-style:none;display:grid}.pb-side-box a{color:#3f3852;border-radius:10px;align-items:flex-start;gap:8px;padding:7px 9px;font-size:13.5px;line-height:1.5;text-decoration:none;transition:background .15s,color .15s;display:flex}.pb-side-box a>span:first-child{background:var(--pb-soft);min-width:22px;height:22px;color:var(--pb-mute);border-radius:7px;flex:none;place-items:center;font-size:11.5px;font-weight:800;display:grid}.pb-side-box a:hover{background:var(--tone-bg);color:var(--pb-ink)}.pb-toc a.is-here,.pb-side-part a[aria-current=page]{background:var(--tone-bg);color:var(--tone);font-weight:700}.pb-toc a.is-here>span:first-child,.pb-side-part a[aria-current=page]>span:first-child{background:var(--tone);color:#fff}.pb-side-part .pb-tick{width:18px;height:18px;margin-left:auto;font-size:10px}.pb-body{word-break:keep-all;overflow-wrap:break-word;min-width:0;max-width:800px;font-size:16.5px}.pb-body>p{margin:0 0 18px;line-height:2}.pb-h{align-items:center;gap:14px;margin:44px 0 16px;scroll-margin-top:24px;font-size:clamp(20px,2.4vw,25px);line-height:1.45;display:flex}.pb-h:first-child{margin-top:4px}.pb-h-no{background:var(--tone-bg);width:42px;height:42px;color:var(--tone);border-radius:13px;flex:none;place-items:center;font-size:18px;font-weight:800;display:grid}.pb-h small{color:var(--tone);margin-top:2px;font-size:14.5px;font-weight:600;display:block}.pb-note{background:#f3f0fb;border:1px solid #ded5f2;border-radius:18px;gap:14px;margin:22px 0;padding:16px 18px;display:flex}.pb-note>i{flex:none;font-size:20px;font-style:normal;line-height:1.4}.pb-note strong{color:#4b3178;margin-bottom:4px;font-size:14.5px;display:block}.pb-note p{color:#3f3852;margin:0;font-size:15px;line-height:1.9}.pb-note.is-warn{background:#fff5ea;border-color:#f3d7b3}.pb-note.is-warn strong{color:#9a5a0f}.pb-note.is-tip{background:#fffbe8;border-color:#f0e2a4}.pb-note.is-tip strong{color:#7d6310}.pb-note.is-exam{background:#eaf4fb;border-color:#c9e0f2}.pb-note.is-exam strong{color:#1d628f}.pb-body figure{margin:24px 0}.pb-body figcaption{color:var(--tone);align-items:center;gap:8px;margin-bottom:10px;font-size:14.5px;font-weight:800;display:flex}.pb-body figcaption:before{content:"";background:var(--tone);border-radius:3px;width:5px;height:18px}.pb-scroll{border:1px solid var(--pb-line);background:#fff;border-radius:18px;overflow-x:auto}.pb-table table{border-collapse:collapse;width:100%;min-width:460px;font-size:14.5px;line-height:1.7}.pb-table th{text-align:left;background:var(--tone);color:#fff;white-space:nowrap;padding:12px 15px;font-weight:700;position:sticky;top:0}.pb-table td{border-top:1px solid var(--pb-line);vertical-align:top;word-break:keep-all;overflow-wrap:break-word;min-width:5.5em;padding:11px 15px}.pb-table tbody tr:nth-child(2n) td{background:#faf9fc}.pb-table tbody tr:hover td{background:var(--tone-bg)}.pb-table td:first-child{font-weight:700}.pb-pairs ul{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:8px;margin:0;padding:0;list-style:none;display:grid}.pb-pairs li{border:1px solid var(--pb-line);border-left:4px solid var(--tone-2);background:#fff;border-radius:14px;gap:3px;padding:12px 14px;transition:transform .15s,border-color .15s;display:grid}.pb-pairs li:hover{border-color:var(--tone-2);transform:translateY(-2px)}.pb-pairs b{color:var(--pb-ink);font-size:17px}.pb-pairs span{color:var(--pb-mute);font-size:13.5px;line-height:1.6}.pb-examples ol{counter-reset:pbex;gap:10px;margin:0;padding:0;list-style:none;display:grid}.pb-examples li{background:var(--pb-soft);border:1px solid var(--pb-line);counter-increment:pbex;border-radius:16px;gap:5px;padding:14px 16px 14px 52px;display:grid;position:relative}.pb-examples li:before{content:counter(pbex);background:var(--tone);color:#fff;border-radius:50%;place-items:center;width:26px;height:26px;font-size:12.5px;font-weight:800;display:grid;position:absolute;top:14px;left:14px}.pb-examples b{white-space:pre-line;word-break:keep-all;font-size:17px;line-height:1.7}.pb-examples span{color:#4d4560;white-space:pre-line;font-size:14.5px;line-height:1.75}.pb-examples em{color:var(--tone);border-top:1px dashed var(--pb-line);padding-top:4px;font-size:13px;font-style:normal;line-height:1.7}.pb-check .kb-check{background:linear-gradient(135deg,#eef8f2,#fff);border:1.5px solid #bfe3cf;border-radius:22px;margin:30px 0;padding:22px}.pb-check .kb-check h3{color:#1f7a50;align-items:center;gap:8px;margin:0;font-size:14px;display:flex}.pb-check .kb-check h3:before{content:"✅"}.pb-check .kb-q{margin:10px 0 14px;font-size:15.5px;font-weight:600;line-height:1.8}.pb-check .kb-q span{white-space:pre-line;margin-top:6px;font-size:17px;display:inline-block}.pb-check ol{counter-reset:pbopt;gap:8px;margin:0;padding:0;list-style:none;display:grid}.pb-check li{counter-increment:pbopt}.pb-check button{width:100%;min-height:50px;color:var(--pb-ink);font:inherit;text-align:left;cursor:pointer;background:#fff;border:1.5px solid #d7e8dd;border-radius:14px;align-items:center;gap:12px;padding:10px 14px;font-size:16px;transition:border-color .15s,background .15s;display:flex}.pb-check button:before{content:counter(pbopt);color:#1f7a50;background:#eef6f1;border-radius:50%;flex:none;place-items:center;width:28px;height:28px;font-size:13px;font-weight:800;display:grid}.pb-check button:not(:disabled):hover{background:#f6fbf8;border-color:#1f8a5b}.pb-check button:disabled{cursor:default;color:var(--pb-ink)}.pb-check button.is-right{background:#e3f5eb;border-color:#1f8a5b}.pb-check button.is-right:before{color:#fff;background:#1f8a5b}.pb-check button.is-wrong{background:#fdecea;border-color:#c2413a}.pb-check button.is-wrong:before{color:#fff;background:#c2413a}.pb-check .kb-why{background:#fff;border:1px solid #d7e8dd;border-radius:14px;margin:14px 0 0;padding:14px 16px;font-size:15px;line-height:1.9}.pb-end{border-top:1px solid var(--pb-line);gap:16px;margin-top:48px;padding-top:26px;display:grid}.pb-mark{border:1.5px solid var(--tone);min-height:48px;color:var(--tone);font:inherit;cursor:pointer;background:#fff;border-radius:99px;justify-self:center;padding:11px 22px;font-weight:800;transition:background .15s,color .15s}.pb-mark:hover{background:var(--tone-bg)}.pb-mark.is-on{color:#fff;background:#1f8a5b;border-color:#1f8a5b}.pb-next{grid-template-columns:1fr 1fr;gap:12px;display:grid}.pb-next a{border:1px solid var(--pb-line);color:var(--pb-ink);background:#fff;border-radius:18px;gap:4px;padding:16px 18px;text-decoration:none;transition:border-color .15s,transform .15s;display:grid}.pb-next a:hover{border-color:var(--tone);transform:translateY(-2px)}.pb-next small{color:var(--pb-mute);font-size:12.5px;font-weight:700}.pb-next span{font-size:15.5px;font-weight:800;line-height:1.5}.pb-next .is-next{text-align:right;background:var(--tone);border-color:var(--tone);color:#fff}.pb-next .is-next small{color:#fffc}@media (max-width:1000px){.pb-layout{grid-template-columns:1fr;gap:18px}.pb-side{max-height:none;position:static}.pb-side-box:not([open]){padding:13px 16px}}@media (max-width:760px){.pb-hero{grid-template-columns:1fr}.pb-ring{width:140px;height:140px}.pb-stats div{flex:40%;min-width:0}.pb-part-head{grid-template-columns:1fr;padding:18px}.pb-part-no{border-radius:18px;width:58px;height:58px;font-size:18px}.pb-ch-head{grid-template-columns:1fr;gap:14px}.pb-ch-no{border-radius:22px;width:76px;height:76px;font-size:30px}.pb-body{font-size:16px}.pb-next{grid-template-columns:1fr}.pb-next .is-next{text-align:left}.pb-examples li{padding-left:46px}}@media (prefers-reduced-motion:reduce){.pb *,.pb :before{transition:none!important}}.pb .tone-8,.pb.tone-8{--tone:#b8457a;--tone-bg:#fbecf3;--tone-2:#db86ad}.pb .tone-9,.pb.tone-9{--tone:#5d6b7a;--tone-bg:#eef1f4;--tone-2:#8f9cab}.pb-lockline{background:#fff7df;border:1px dashed #e2c46a;border-radius:14px;margin:0 0 18px;padding:12px 16px;font-weight:600}.pb-lockline a{font-weight:800;text-decoration:underline}.pb-card.is-locked{opacity:.72}