@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-serif:ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.\!hidden{display:none!important}.block{display:block}.contents{display:contents}.hidden{display:none}.table{display:table}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.border{border-style:var(--tw-border-style);border-width:1px}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.italic{font-style:italic}.underline{text-decoration-line:underline}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.grayscale{--tw-grayscale:grayscale(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.invert{--tw-invert:invert(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.\[agentkeepalive\:deprecated\]{agentkeepalive:deprecated}.\[yanxiang\:auth-email\]{yanxiang:auth-email}.\[yanxiang\:brand\]{yanxiang:brand}.\[yanxiang\:cleanup\]{yanxiang:cleanup}.\[yanxiang\:content\]{yanxiang:content}.\[yanxiang\:qa-auth\]{yanxiang:qa-auth}.\[yanxiang\:qa\]{yanxiang:qa}.\[yanxiang\:review-submit\]{yanxiang:review-submit}.\[yanxiang\:seed\]{yanxiang:seed}}:root{--yx-primary:#d93a28;--yx-primary-dark:#a92b20;--yx-primary-soft:#f8d8d1;--yx-accent:#292647;--yx-accent-soft:#e2e0ff;--yx-paper:#f7f2ea;--yx-surface:#fffdf9;--yx-ink:#211d2e;--yx-muted:#6c6676;--yx-line:#ddd8e0;--yx-success:#2f765f;--yx-warning:#a86a1f;--yx-error:#a94f44;--yx-shadow-sm:0 8px 22px #29264712;--yx-shadow-lg:0 24px 70px #29264721;--yx-radius-sm:10px;--yx-radius-md:16px;--yx-radius-lg:24px;--yx-radius-xl:34px;--yx-container:1200px;--yx-reading:740px;--font-sans:"Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--font-serif:"Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun, serif}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--yx-paper)}body{background:var(--yx-surface);min-width:320px;color:var(--yx-ink);font-family:var(--font-sans);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.7}body,button,input,textarea,select{font-family:var(--font-sans)}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,summary,a{-webkit-tap-highlight-color:transparent}img{max-width:100%;height:auto}::selection{background:var(--yx-primary-soft);color:var(--yx-ink)}:focus-visible{outline:3px solid var(--yx-accent-soft);outline-offset:3px}.skip-link{z-index:1000;background:var(--yx-accent);color:#fff;border-radius:999px;padding:10px 16px;transition:transform .16s;position:fixed;top:12px;left:12px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.container{width:min(calc(100% - 40px), var(--yx-container));margin-inline:auto}.narrow-container{width:min(100% - 40px,900px);margin-inline:auto}.section{padding-block:88px}.section--paper{background:var(--yx-paper)}.section--accent{background:var(--yx-accent);color:var(--yx-surface)}.section-heading{justify-content:space-between;align-items:end;gap:28px;margin-bottom:34px;display:flex}.section-heading h2,.page-heading h1{letter-spacing:-.045em;margin:0;font-size:clamp(2.1rem,4.6vw,4.3rem);line-height:1.08}.section-heading h2{max-width:760px;font-size:clamp(1.8rem,3vw,3.1rem)}.section-heading p,.page-heading p{max-width:580px;color:var(--yx-muted);margin:12px 0 0;font-size:1.05rem}.section-heading__action{flex:none}.eyebrow{color:var(--yx-primary);letter-spacing:.16em;text-transform:uppercase;align-items:center;gap:8px;margin-bottom:18px;font-size:.76rem;font-weight:750;display:inline-flex}.eyebrow:before{content:"";background:currentColor;width:22px;height:3px}.eyebrow--light{color:var(--yx-accent-soft)}.button{cursor:pointer;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:0 22px;font-size:.94rem;font-weight:720;line-height:1;transition:transform .16s,box-shadow .16s,background-color .16s,color .16s,border-color .16s;display:inline-flex}.button:hover{transform:translateY(-1px)}.button:disabled{cursor:not-allowed;opacity:.58;transform:none}.button--primary{background:var(--yx-primary);color:var(--yx-surface)}.button--primary:hover{background:var(--yx-primary-dark);box-shadow:0 8px 24px #d93a2838}.button--accent{background:var(--yx-accent);color:var(--yx-surface)}.button--outline{border-color:var(--yx-line);color:var(--yx-ink);background:0 0}.button--outline:hover{border-color:var(--yx-primary);color:var(--yx-primary)}.button--light{background:var(--yx-surface);color:var(--yx-accent)}.button--small{min-height:38px;padding-inline:18px;font-size:.86rem}.button--wide{width:100%}.text-link,.card-link{color:var(--yx-primary);align-items:center;gap:5px;font-weight:700;display:inline-flex}.text-link:hover,.card-link:hover{color:var(--yx-primary-dark)}.brand-logo{align-items:center;gap:11px;line-height:1;display:inline-flex}.brand-logo img{width:42px;height:42px}.brand-logo__type{gap:4px;display:grid}.brand-logo__type strong{color:var(--yx-primary);letter-spacing:.04em;font-size:1.26rem}.brand-logo__type small{color:var(--yx-muted);letter-spacing:.13em;font-size:.58rem}.brand-logo--reverse .brand-logo__type strong,.brand-logo--reverse .brand-logo__type small{color:var(--yx-surface)}.site-header{z-index:100;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffdf9eb;border-bottom:1px solid #ddd8e0b8;position:sticky;top:0}.site-header__inner{justify-content:space-between;align-items:center;gap:30px;min-height:74px;display:flex}.desktop-nav{align-items:center;gap:30px;margin-left:auto;display:flex}.desktop-nav a{color:#514b5b;font-size:.92rem;font-weight:620}.desktop-nav a:hover{color:var(--yx-primary)}.site-header__actions,.auth-nav{align-items:center;gap:16px;display:flex}.auth-nav-skeleton{background:var(--yx-paper);border-radius:999px;width:78px;height:38px}.mobile-menu{display:none}.mobile-menu summary{border:1px solid var(--yx-line);cursor:pointer;border-radius:50%;place-content:center;gap:5px;width:42px;height:42px;list-style:none;display:grid}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary span{background:var(--yx-ink);width:17px;height:2px;display:block}.mobile-menu nav{border:1px solid var(--yx-line);border-radius:var(--yx-radius-md);background:var(--yx-surface);width:min(280px,100vw - 40px);box-shadow:var(--yx-shadow-lg);padding:14px;display:grid;position:absolute;top:66px;right:20px}.mobile-menu nav a{border-radius:8px;padding:10px 12px;font-weight:650}.mobile-menu nav a:hover{background:var(--yx-paper);color:var(--yx-primary)}.site-footer{background:var(--yx-accent);color:var(--yx-surface);padding:66px 0 24px}.site-footer__grid{grid-template-columns:minmax(280px,2fr) repeat(3,1fr);gap:56px;display:grid}.site-footer__brand p{color:#fffdf9ad;max-width:300px;margin:24px 0 0}.site-footer__column{align-content:start;gap:10px;display:grid}.site-footer__column strong{color:var(--yx-accent-soft);margin-bottom:8px}.site-footer__column a{color:#fffdf9bd;font-size:.92rem}.site-footer__column a:hover{color:#fff}.site-footer__bottom{color:#fffdf98c;border-top:1px solid #ffffff24;justify-content:space-between;gap:30px;margin-top:58px;padding-top:22px;font-size:.78rem;display:flex}.hero{background:radial-gradient(circle at 88% 14%, #e2e0ffb8, transparent 28%), var(--yx-surface);padding:80px 0 68px;overflow:hidden}.hero__grid{grid-template-columns:minmax(0,1.04fr) minmax(420px,.96fr);align-items:center;gap:70px;display:grid}.hero h1{letter-spacing:-.065em;max-width:690px;margin:0;font-size:clamp(3rem,6vw,6.3rem);line-height:1.01}.hero__title-line{white-space:nowrap;display:block}.hero h1 strong{color:var(--yx-primary);font-weight:inherit}.hero__lead{max-width:610px;color:var(--yx-muted);margin:28px 0 32px;font-size:clamp(1rem,1.8vw,1.18rem);line-height:1.9}.hero__actions{flex-wrap:wrap;gap:12px;display:flex}.hero__trust{color:var(--yx-muted);flex-wrap:wrap;gap:18px;margin-top:34px;font-size:.82rem;display:flex}.hero__trust span{align-items:center;gap:7px;display:inline-flex}.hero__trust span:before{background:var(--yx-primary);content:"";border-radius:50%;width:6px;height:6px}.hero-feature{border-radius:var(--yx-radius-xl);background:var(--yx-primary);color:#fff;flex-direction:column;min-height:440px;padding:38px 40px 40px;display:flex;position:relative;overflow:hidden;box-shadow:0 24px 70px #d93a2833}.hero-feature__index{color:#ffffffb8;letter-spacing:.12em;border-bottom:1px solid #ffffff3d;justify-content:space-between;align-items:center;padding-bottom:18px;font-size:.76rem;font-weight:700;display:flex}.hero-feature__index span:last-child{letter-spacing:.08em;border:1px solid #ffffff4d;border-radius:999px;padding:6px 10px}.hero-feature__body{flex:1;align-content:center;padding:34px 0 30px;display:grid}.hero-feature__divider{background:var(--yx-accent);width:54px;height:4px;margin-bottom:24px}.hero-feature h2{max-width:430px;margin:0;font-size:clamp(1.7rem,3vw,2.65rem);line-height:1.3}.hero-feature p{color:#ffffffc7;max-width:430px;margin:18px 0 0;font-size:.95rem;line-height:1.75}.hero-feature a{color:var(--yx-primary);background:#fff;border-radius:999px;align-self:flex-start;align-items:center;gap:9px;padding:12px 17px;font-weight:700;display:inline-flex}.hero-feature a:hover{background:var(--yx-accent-soft)}.module-grid{grid-template-columns:repeat(4,1fr);gap:18px;display:grid}.module-card{border:1px solid var(--yx-line);border-radius:var(--yx-radius-lg);background:var(--yx-surface);min-height:260px;padding:26px;transition:transform .18s,box-shadow .18s,border-color .18s;position:relative}.module-card:hover{border-color:var(--yx-primary-soft);box-shadow:var(--yx-shadow-lg);transform:translateY(-4px)}.module-card__number{color:var(--yx-primary);letter-spacing:.13em;font-size:.76rem;font-weight:800}.module-card h3{margin:50px 0 12px;font-size:1.35rem}.module-card p{color:var(--yx-muted);margin:0;font-size:.92rem}.module-card svg{color:var(--yx-primary);position:absolute;bottom:22px;right:22px}.content-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.content-card{border:1px solid var(--yx-line);border-radius:var(--yx-radius-lg);background:var(--yx-surface);min-height:330px;box-shadow:var(--yx-shadow-sm);flex-direction:column;padding:28px;display:flex}.content-card--featured{background:var(--yx-accent);color:var(--yx-surface)}.content-card__meta{color:var(--yx-primary);letter-spacing:.04em;justify-content:space-between;gap:12px;font-size:.75rem;font-weight:750;display:flex}.content-card--featured .content-card__meta{color:var(--yx-accent-soft)}.content-card h2{margin:42px 0 14px;font-size:1.42rem;line-height:1.4}.content-card h2 a:hover{color:var(--yx-primary)}.content-card p{color:var(--yx-muted);margin:0 0 22px;font-size:.93rem}.content-card--featured p{color:#fffdf9b3}.content-card .card-link{margin-top:auto}.content-card--featured .card-link{color:#fff}.tag-row{flex-wrap:wrap;gap:7px;margin:2px 0 22px;display:flex}.tag{background:var(--yx-paper);min-height:27px;color:var(--yx-muted);border-radius:999px;align-items:center;padding-inline:10px;font-size:.72rem;font-weight:650;display:inline-flex}.answer-banner{border-radius:var(--yx-radius-xl);background:var(--yx-primary);color:#fff;grid-template-columns:.8fr 1.2fr;display:grid;overflow:hidden}.answer-banner__mark{background:var(--yx-accent);place-items:center;min-height:370px;display:grid}.answer-banner__mark img{width:min(58%,220px)}.answer-banner__copy{flex-direction:column;justify-content:center;padding:54px;display:flex}.answer-banner__copy h2{max-width:610px;margin:0 0 18px;font-size:clamp(1.9rem,3.8vw,3.6rem);line-height:1.22}.answer-banner__copy p{color:#ffffffc2;max-width:590px;margin:0 0 28px}.page-hero{border-bottom:1px solid var(--yx-line);background:linear-gradient(120deg, transparent 58%, #f8d8d18f), var(--yx-paper);padding:70px 0 58px}.page-heading{max-width:800px}.breadcrumbs{color:var(--yx-muted);flex-wrap:wrap;gap:7px;margin-bottom:26px;font-size:.8rem;display:flex}.breadcrumbs span{gap:7px;display:inline-flex}.breadcrumbs a:hover{color:var(--yx-primary)}.listing-toolbar{justify-content:space-between;align-items:center;gap:20px;margin-bottom:30px;display:flex}.filter-row{flex-wrap:wrap;gap:8px;display:flex}.filter-chip{border:1px solid var(--yx-line);background:var(--yx-surface);min-height:38px;color:var(--yx-muted);border-radius:999px;align-items:center;padding-inline:15px;font-size:.84rem;font-weight:650;display:inline-flex}.filter-chip--active,.filter-chip:hover{border-color:var(--yx-primary);background:var(--yx-primary);color:#fff}.article-shell{grid-template-columns:minmax(0,1fr) 280px;align-items:start;gap:70px;padding-block:64px 100px;display:grid}.article-shell>article{min-width:0}.article-header{max-width:860px;margin-bottom:44px}.article-header h1{letter-spacing:-.05em;margin:16px 0 22px;font-size:clamp(2.35rem,5vw,4.7rem);line-height:1.11}.article-header__excerpt{max-width:760px;color:var(--yx-muted);margin:0;font-size:1.14rem;line-height:1.9}.article-meta{color:var(--yx-muted);flex-wrap:wrap;gap:16px;margin-top:26px;font-size:.82rem;display:flex}.demo-notice{border-left:4px solid var(--yx-primary);background:var(--yx-primary-soft);color:#70251c;border-radius:0 10px 10px 0;margin:26px 0;padding:14px 18px;font-size:.88rem}.direct-answer{border-radius:var(--yx-radius-lg);background:var(--yx-accent);color:#fff;margin:0 0 40px;padding:28px}.direct-answer strong{color:var(--yx-accent-soft);letter-spacing:.12em;margin-bottom:10px;font-size:.78rem;display:block}.direct-answer p{font-family:var(--font-serif);margin:0;font-size:1.28rem;line-height:1.75}.article-summary{border:1px solid var(--yx-primary);margin:0 0 38px;padding:26px 28px}@supports (color:color-mix(in lab, red, red)){.article-summary{border:1px solid color-mix(in srgb, var(--yx-primary) 24%, var(--yx-line))}}.article-summary{border-radius:var(--yx-radius-lg);background:var(--yx-primary-soft)}.article-summary strong{color:var(--yx-primary);letter-spacing:.12em;margin-bottom:12px;font-size:.78rem;display:block}.article-summary ul{margin:0;padding-left:1.2em}.article-summary li+li{margin-top:8px}.article-body{max-width:var(--yx-reading);font-size:1.05rem;line-height:1.92}.article-body h2{margin:2.2em 0 .75em;font-size:1.75rem;line-height:1.35}.article-body h3{margin:1.9em 0 .7em;font-size:1.28rem}.article-body p,.article-body ul,.article-body ol{margin:0 0 1.2em}.article-body blockquote{background:var(--yx-paper);color:var(--yx-muted);border:0;border-radius:12px;margin:0 0 2em;padding:17px 20px;font-size:.92rem}.article-body li{margin-bottom:.5em}.article-body a,.article-sources a{color:var(--yx-accent);text-decoration:underline;-webkit-text-decoration-color:var(--yx-accent);-webkit-text-decoration-color:var(--yx-accent);-webkit-text-decoration-color:var(--yx-accent);text-decoration-color:var(--yx-accent)}@supports (color:color-mix(in lab, red, red)){.article-body a,.article-sources a{-webkit-text-decoration-color:color-mix(in srgb, var(--yx-accent) 32%, transparent);-webkit-text-decoration-color:color-mix(in srgb, var(--yx-accent) 32%, transparent);-webkit-text-decoration-color:color-mix(in srgb, var(--yx-accent) 32%, transparent);text-decoration-color:color-mix(in srgb, var(--yx-accent) 32%, transparent)}}.article-body a,.article-sources a{text-underline-offset:.22em}.article-body table{border-spacing:0;border-collapse:collapse;width:100%;margin:1.5em 0 2em;font-size:.9rem;line-height:1.6;display:block;overflow-x:auto}.article-body th,.article-body td{border:1px solid var(--yx-line);text-align:left;vertical-align:top;min-width:130px;padding:11px 13px}.article-body th{background:var(--yx-paper);color:var(--yx-ink)}.article-body pre{background:var(--yx-ink);color:var(--yx-surface);border-radius:12px;margin:1.5em 0 2em;padding:20px;font-size:.88rem;line-height:1.7;overflow-x:auto}.article-sources{max-width:var(--yx-reading);border-top:1px solid var(--yx-line);margin-top:58px;padding-top:32px}.article-sources h2{margin:8px 0 18px;font-size:1.5rem}.article-sources ol{margin:0;padding-left:1.3em}.article-sources li{margin-bottom:12px;padding-left:4px}.article-sources li span{color:var(--yx-muted);margin-top:3px;font-size:.82rem;display:block}.article-sources>p{color:var(--yx-muted);margin:20px 0 0;font-size:.82rem}.article-aside{gap:18px;display:grid;position:sticky;top:102px}.aside-card{border:1px solid var(--yx-line);border-radius:var(--yx-radius-md);background:var(--yx-paper);padding:22px}.aside-card strong{margin-bottom:8px;display:block}.aside-card p{color:var(--yx-muted);margin:0 0 16px;font-size:.86rem}.related-links{gap:12px;display:grid}.related-links a{color:var(--yx-accent);font-size:.88rem;line-height:1.5}.related-links a:hover{color:var(--yx-primary)}.guide-jump-nav{flex-wrap:wrap;gap:10px;margin-bottom:52px;display:flex}.guide-jump-nav a{border:1px solid var(--yx-line);background:var(--yx-surface);border-radius:999px;align-items:center;gap:9px;padding:10px 14px;font-size:.88rem;display:inline-flex}.guide-jump-nav span{color:var(--yx-primary);font-size:.75rem;font-weight:800}.guide-groups{gap:72px;display:grid}.guide-group{scroll-margin-top:110px}.guide-group__heading{margin-bottom:22px}.guide-group__heading h2{margin:6px 0 0;font-size:clamp(1.6rem,3vw,2.25rem)}.frontier-facts{border:1px solid var(--yx-line);border-radius:var(--yx-radius-lg);background:var(--yx-paper);gap:18px;margin-bottom:38px;padding:28px;display:grid}.frontier-facts__item span{color:var(--yx-primary);letter-spacing:.1em;margin-bottom:6px;font-size:.75rem;font-weight:800;display:block}.frontier-facts__item p{margin:0}.wechat-card{border-radius:var(--yx-radius-xl);background:var(--yx-accent);color:#fff;grid-template-columns:1fr auto;align-items:center;gap:48px;padding:44px;display:grid}.wechat-card__copy h2{max-width:660px;margin:0 0 14px;font-size:clamp(1.7rem,3vw,2.8rem);line-height:1.25}.wechat-card__copy p{color:#ffffffb3;max-width:620px;margin:0 0 26px}.qr-placeholder{aspect-ratio:1;background:linear-gradient(90deg, var(--yx-accent) 50%, transparent 50%) 0 0 / 22px 22px, linear-gradient(var(--yx-accent) 50%, transparent 50%) 0 0 / 22px 22px, white;width:180px;color:var(--yx-accent);text-align:center;border:12px solid #fff;border-radius:16px;place-content:center;display:grid}.qr-placeholder span,.qr-placeholder small{background:#fff;padding:2px 7px;font-weight:800}.qr-placeholder small{color:var(--yx-muted);font-size:.68rem}.wechat-card--compact{grid-template-columns:1fr;padding:28px}.wechat-card--compact .qr-placeholder{display:none}.auth-page{background:radial-gradient(circle at 18% 18%, var(--yx-primary-soft), transparent 28%), radial-gradient(circle at 82% 12%, var(--yx-accent-soft), transparent 26%), var(--yx-paper);min-height:calc(100vh - 74px);padding:70px 0 90px}.auth-shell{border:1px solid var(--yx-line);border-radius:var(--yx-radius-xl);background:var(--yx-surface);width:min(100% - 40px,520px);box-shadow:var(--yx-shadow-lg);margin-inline:auto;padding:38px}.auth-shell__header{margin-bottom:28px}.auth-shell__header h1{margin:0 0 8px;font-size:2rem}.auth-shell__header p{color:var(--yx-muted);margin:0}.form-stack{gap:18px;display:grid}.form-field{gap:7px;display:grid}.form-field label,.form-label{color:#4f4958;font-size:.86rem;font-weight:700}.form-field input,.form-field textarea,.form-field select,.search-input{border:1px solid var(--yx-line);width:100%;min-height:48px;color:var(--yx-ink);background:#fff;border-radius:11px;padding:10px 13px;transition:border-color .16s,box-shadow .16s}.form-field input:focus,.form-field textarea:focus,.form-field select:focus,.search-input:focus{border-color:var(--yx-primary);box-shadow:0 0 0 4px var(--yx-primary-soft);outline:none}.form-field__hint{color:var(--yx-muted);font-size:.76rem}.captcha-input-row{grid-template-columns:minmax(0,1fr) 188px 46px;align-items:center;gap:9px;display:grid}.captcha-image{border:1px solid var(--yx-line);background:var(--yx-paper);object-fit:cover;border-radius:11px;width:188px;height:58px;display:block}.captcha-refresh{border:1px solid var(--yx-line);width:46px;height:46px;color:var(--yx-primary);cursor:pointer;background:#fff;border-radius:11px;place-items:center;display:inline-grid}.captcha-refresh:hover,.captcha-refresh:focus-visible{border-color:var(--yx-primary);background:var(--yx-primary-soft);outline:none}.form-row{justify-content:space-between;align-items:center;gap:16px;display:flex}.form-message{border-radius:10px;padding:12px 14px;font-size:.86rem}.form-message--error{color:#812c22;background:#f8ded9}.form-message--success{color:#255d4b;background:#ddede7}.auth-shell__footer{color:var(--yx-muted);text-align:center;margin:24px 0 0;font-size:.88rem}.review-hero{background:var(--yx-paper);padding:70px 0 50px}.review-workspace{border:1px solid var(--yx-line);border-radius:var(--yx-radius-xl);background:var(--yx-surface);box-shadow:var(--yx-shadow-lg);grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);display:grid;overflow:hidden}.review-workspace__intro,.review-workspace__panel{padding:46px}.review-workspace__intro{background:var(--yx-accent);color:#fff}.review-workspace__intro h1{margin:18px 0;font-size:clamp(2.2rem,4vw,4rem);line-height:1.1}.review-workspace__intro p{color:#ffffffb8}.review-points{gap:14px;margin-top:32px;display:grid}.review-point{align-items:start;gap:12px;font-size:.9rem;display:flex}.review-point svg{color:var(--yx-accent-soft);flex:none}.upload-zone{border:2px dashed var(--yx-line);border-radius:var(--yx-radius-lg);background:var(--yx-paper);text-align:center;place-content:center;min-height:220px;padding:28px;transition:border-color .16s,background .16s;display:grid}.upload-zone:hover,.upload-zone--active{border-color:var(--yx-primary);background:var(--yx-primary-soft)}.upload-zone input{opacity:0;width:1px;height:1px;position:absolute;overflow:hidden}.upload-zone__icon{background:var(--yx-primary-soft);width:58px;height:58px;color:var(--yx-primary);border-radius:50%;place-items:center;margin:0 auto 14px;display:grid}.upload-zone strong{font-size:1rem}.upload-zone span{color:var(--yx-muted);font-size:.78rem}.selected-file{background:var(--yx-paper);border-radius:11px;justify-content:space-between;align-items:center;gap:14px;margin-top:14px;padding:13px 15px;display:flex}.selected-file__name{min-width:0}.selected-file__name strong,.selected-file__name span{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.selected-file__name span{color:var(--yx-muted);font-size:.74rem}.checkbox-row{color:var(--yx-muted);align-items:start;gap:10px;font-size:.82rem;display:flex}.checkbox-row input{width:17px;height:17px;accent-color:var(--yx-primary);margin-top:5px}.account-page{background:var(--yx-paper);min-height:70vh;padding:56px 0 100px}.account-layout{grid-template-columns:230px minmax(0,1fr);gap:32px;display:grid}.account-nav{border:1px solid var(--yx-line);border-radius:var(--yx-radius-md);background:var(--yx-surface);align-self:start;gap:5px;padding:15px;display:grid;position:sticky;top:104px}.account-nav a{color:var(--yx-muted);border-radius:9px;padding:10px 12px;font-size:.9rem;font-weight:650}.account-nav a:hover{background:var(--yx-paper);color:var(--yx-primary)}.account-content{min-width:0}.account-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px;display:flex}.account-heading h1{margin:0;font-size:2.3rem}.account-card{border:1px solid var(--yx-line);border-radius:var(--yx-radius-lg);background:var(--yx-surface);padding:26px}.account-stat-grid{grid-template-columns:repeat(3,1fr);gap:15px;display:grid}.account-stat strong{color:var(--yx-primary);font-size:2rem;display:block}.account-stat span{color:var(--yx-muted);font-size:.82rem}.review-list{gap:12px;display:grid}.review-list-item{border:1px solid var(--yx-line);border-radius:var(--yx-radius-md);background:var(--yx-surface);grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:20px;padding:17px 19px;display:grid}.review-list-item__file{min-width:0}.review-list-item__file strong,.review-list-item__file span{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.review-list-item__file span{color:var(--yx-muted);font-size:.75rem}.spin{animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.status-badge{border-radius:999px;align-items:center;min-height:28px;padding-inline:10px;font-size:.72rem;font-weight:750;display:inline-flex}.status-badge--success{color:#255d4b;background:#ddede7}.status-badge--pending{color:#7c501c;background:#f7ead8}.status-badge--error{color:#812c22;background:#f8ded9}.result-summary{border-radius:var(--yx-radius-lg);background:var(--yx-accent);color:#fff;padding:28px}.result-summary span{color:var(--yx-accent-soft);letter-spacing:.11em;font-size:.76rem;font-weight:800}.result-summary p{font-family:var(--font-serif);margin:12px 0 0;font-size:1.25rem}.result-sections{gap:14px;margin-top:18px;display:grid}.result-section{border:1px solid var(--yx-line);border-radius:var(--yx-radius-md);background:var(--yx-surface);padding:24px}.result-section__header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:12px;display:flex}.result-section h2{margin:0;font-size:1.2rem}.result-section p{color:var(--yx-muted)}.result-columns{grid-template-columns:1fr 1fr;gap:18px;display:grid}.result-columns h3{font-size:.9rem}.result-columns ul{color:var(--yx-muted);margin:0;padding-left:1.2em;font-size:.88rem}.empty-state{border:1px dashed var(--yx-line);border-radius:var(--yx-radius-lg);background:var(--yx-surface);text-align:center;padding:54px 24px}.empty-state h2{margin:14px 0 6px}.empty-state p{max-width:440px;color:var(--yx-muted);margin:0 auto 20px}.search-form{gap:10px;max-width:720px;display:flex}.search-results{gap:12px;margin-top:34px;display:grid}.search-result{border:1px solid var(--yx-line);border-radius:var(--yx-radius-md);background:var(--yx-surface);padding:22px}.search-result h2{margin:8px 0;font-size:1.25rem}.search-result p{color:var(--yx-muted);margin:0}.legal-page{padding:64px 0 100px}.legal-page article{max-width:var(--yx-reading)}.legal-page h1{font-size:clamp(2.3rem,5vw,4rem)}.legal-page h2{margin-top:2.2em}.legal-page p,.legal-page li{color:#514b5b}.not-found{text-align:center;place-content:center;min-height:65vh;padding:40px;display:grid}.not-found strong{color:var(--yx-primary);font-size:6rem;line-height:1}@media (max-width:1020px){.desktop-nav{gap:18px}.hero__grid{grid-template-columns:1fr}.hero-feature{min-height:370px}.module-grid{grid-template-columns:repeat(2,1fr)}.article-shell{grid-template-columns:1fr}.article-aside{grid-template-columns:1fr 1fr;position:static}.site-footer__grid{grid-template-columns:2fr repeat(3,1fr);gap:28px}}@media (max-width:820px){.desktop-nav,.site-header__actions>.auth-nav{display:none}.mobile-menu{display:block}.section{padding-block:64px}.content-grid{grid-template-columns:1fr}.content-card{min-height:280px}.answer-banner{grid-template-columns:1fr}.answer-banner__mark{min-height:220px}.answer-banner__copy{padding:34px}.review-workspace{grid-template-columns:1fr}.review-workspace__intro,.review-workspace__panel{padding:34px}.account-layout{grid-template-columns:1fr}.account-nav{grid-template-columns:repeat(3,1fr);position:static}.site-footer__grid{grid-template-columns:1fr 1fr}.site-footer__brand{grid-column:1/-1}.site-footer__bottom{flex-direction:column}.wechat-card{grid-template-columns:1fr}}@media (max-width:600px){.container,.narrow-container{width:min(calc(100% - 28px), var(--yx-container))}.site-header__inner{min-height:66px}.brand-logo img{width:38px;height:38px}.brand-logo__type small{display:none}.hero{padding:54px 0 48px}.hero h1{font-size:clamp(2.65rem,13.5vw,4.2rem)}.hero-feature{border-radius:24px;min-height:410px;padding:28px}.hero-feature__index{align-items:flex-start;gap:16px;font-size:.7rem}.hero-feature__body{padding-block:30px 26px}.hero-feature p{font-size:.9rem}.module-grid{grid-template-columns:1fr}.module-card{min-height:220px}.section-heading,.listing-toolbar,.account-heading{flex-direction:column;align-items:start}.page-hero{padding:50px 0 42px}.article-shell{gap:44px;padding-block:44px 72px}.article-aside{grid-template-columns:1fr}.wechat-card{border-radius:22px;padding:28px}.qr-placeholder{width:min(180px,100%)}.auth-shell{border-radius:22px;width:min(100% - 24px,520px);padding:28px 22px}.form-row{flex-direction:column;align-items:start}.captcha-input-row{grid-template-columns:minmax(0,1fr) 46px}.captcha-input-row input{grid-column:1/-1}.review-workspace__intro,.review-workspace__panel{padding:26px 22px}.account-nav,.account-stat-grid{grid-template-columns:1fr}.review-list-item{grid-template-columns:1fr;gap:10px}.result-columns{grid-template-columns:1fr}.search-form{flex-direction:column}.site-footer__grid{grid-template-columns:1fr}.site-footer__brand{grid-column:auto}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}