/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@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{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial}::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::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,ui-sans-serif, system-ui, 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{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]){-webkit-appearance:button;appearance:button}::file-selector-button{-webkit-appearance: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{.relative{position:relative}.start{inset-inline-start:var(--spacing)}.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,)}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}}:root{--navy:#151515;--deep:#151515;--blue:#b51f24;--ink:#202020;--muted:#626262}*{box-sizing:border-box;font-family:Inter,PingFang SC,Microsoft YaHei,Arial,sans-serif!important}html{scroll-behavior:smooth}body{color:var(--ink);background:#f7ece7 url(/national-security-gradient-background.png) top/cover no-repeat fixed;margin:0;font-family:Inter,PingFang SC,Microsoft YaHei,Arial,sans-serif}a{color:inherit;text-decoration:none}.site-shell{min-height:100vh;padding-bottom:32px}.topbar{color:#fff;background:linear-gradient(100deg,#141414fa,#570a0df7);border-bottom:3px solid #b51f24;justify-content:space-between;align-items:center;height:78px;padding:0 clamp(24px,5vw,76px);display:flex;box-shadow:0 4px 18px #0000003d}.brand{align-items:center;gap:13px;display:flex}.brand-mark{letter-spacing:.08em;border:2px solid #ffffffd9;border-radius:50%;place-items:center;width:48px;height:48px;font:700 14px/1 serif;display:grid;box-shadow:inset 0 0 0 3px #ffffff1f}.brand-copy{flex-direction:column;gap:3px;display:flex}.brand-copy strong{letter-spacing:.16em;font-size:20px}.brand-copy small{letter-spacing:.16em;opacity:.78;font:500 8px/1.2 Arial,sans-serif}.header-tag{letter-spacing:.12em;opacity:.88;border-left:1px solid #ffffff4d;padding-left:20px;font-size:13px}.hero{text-align:center;padding:58px 24px 43px}.eyebrow{color:var(--blue);letter-spacing:.28em;margin:0 0 8px;font:600 11px/1.4 Arial,sans-serif}.hero h1{color:var(--deep);letter-spacing:.18em;text-indent:.18em;margin:0;font-family:STSong,Songti SC,serif;font-size:clamp(34px,4vw,50px);font-weight:700}.title-rule{width:210px;height:13px;margin:14px auto 7px;position:relative}.title-rule:before,.title-rule:after{content:"";background:linear-gradient(90deg,#0000,#b51f24);width:84px;height:1px;position:absolute;top:6px}.title-rule:after{right:0;transform:scaleX(-1)}.title-rule span{background:var(--blue);width:7px;height:7px;position:absolute;top:3px;left:50%;transform:translate(-50%)rotate(45deg)}.hero>p:last-child{color:#4a3434;letter-spacing:.16em;margin:0;font-size:14px}.learning-sections{gap:48px;width:min(1180px,100% - 48px);margin:0 auto 42px;display:grid}.learning-section{min-width:0}.section-heading{align-items:center;gap:13px;margin:0 0 18px;display:flex}.section-number{color:#fff;background:linear-gradient(135deg,#d43438,#8c1015);border-radius:10px;flex:none;place-items:center;width:42px;height:42px;font:700 14px/1 Arial,sans-serif;display:grid;box-shadow:0 7px 16px #7a0f143d}.section-heading>div{border-left:1px solid #b51f244d;padding-left:13px}.learning-section[aria-labelledby=self-study-title] .section-heading>div{border-left:0;padding-left:0}.section-heading h2{color:var(--deep);letter-spacing:.12em;margin:0;font-family:STSong,Songti SC,serif;font-size:25px}.section-heading p{color:#7c96a7;letter-spacing:.22em;margin:4px 0 0;font:600 9px/1.2 Arial,sans-serif}.placeholder-card{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffc7;border:1px dashed #b51f246b;border-radius:16px;place-items:center;min-height:170px;display:grid;box-shadow:0 10px 30px #3c000417}.placeholder-card span{color:#8d2327;letter-spacing:.14em;background:#b51f2414;border-radius:20px;padding:8px 15px;font-size:12px}.live-teaching-card{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#fff url(/live-card-gradient-background.png) 50%/cover no-repeat;border:1px solid #b51f2426;border-radius:16px;min-height:360px;padding:30px 34px;position:relative;overflow:hidden;box-shadow:0 10px 30px #3c000417}.live-card-copy{z-index:0;min-width:0;position:relative}.live-card-copy h3{color:#211717;letter-spacing:.08em;margin:8px 0 7px;font-size:22px}.live-card-copy p{color:#746262;margin:0;font-size:13px}.live-card-shade{z-index:1;-webkit-backdrop-filter:grayscale(.35);backdrop-filter:grayscale(.35);background:#2d2d2d7a;position:absolute;inset:0}.live-card-actions{z-index:2;flex-direction:column;justify-content:center;align-items:center;gap:18px;display:flex;position:absolute;inset:0}.live-play-button{-webkit-backdrop-filter:blur(7px);backdrop-filter:blur(7px);background:#1414147a;border:1px solid #ffffffc7;border-radius:50%;place-items:center;width:70px;height:70px;transition:transform .18s,background .18s;display:grid;box-shadow:0 10px 30px #00000047,inset 0 0 0 7px #ffffff14}.live-play-button:hover{background:#b51f24e6;transform:scale(1.06)}.live-play-button>span{border-top:10px solid #0000;border-bottom:10px solid #0000;border-left:16px solid #fff;width:0;height:0;margin-left:5px}.live-enter-link{color:#fff;background:#b51f24f0;border-radius:8px;align-items:center;gap:8px;padding:12px 18px;font-size:13px;display:flex;box-shadow:0 6px 18px #00000040}.live-link-icon{font-size:16px;line-height:1;transition:transform .18s}.live-enter-link:hover .live-link-icon{transform:translate(3px)}.course-intro{border-left:4px solid var(--blue);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffd1;border-radius:12px;padding:30px 34px;box-shadow:0 10px 30px #3c000417}.course-intro p{color:#3f3434;text-align:justify;margin:0;font-size:15px;line-height:2}.course-intro p+p{margin-top:.65em}.teaching-grid{grid-template-columns:minmax(0,1fr);gap:36px;display:grid}.teaching-image-card{aspect-ratio:3/2;background:#ffffffb8;border-radius:14px;overflow:hidden;box-shadow:0 12px 32px #3c00041f}.teaching-image-card img{object-fit:cover;width:100%;height:100%;display:block}.lecture-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.lecture-gallery img{background:#fff;border-radius:12px;width:100%;height:auto;display:block;box-shadow:0 10px 28px #3c00041f}.lecture-gallery img:last-child{grid-column:1/-1;justify-self:center;width:calc(50% - 10px)}.class-teaching-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.class-teaching-gallery img{background:#fff;border-radius:12px;width:100%;height:auto;display:block;box-shadow:0 10px 28px #3c00041f}.course-carousel{width:100%;margin-inline:auto}.carousel-stage{position:relative}.carousel-viewport{aspect-ratio:25/9;box-shadow:none;background:0 0;border:0;border-radius:17px;position:relative;overflow:hidden}.carousel-track{perspective:none;transform-style:flat;height:100%;transition:transform .65s cubic-bezier(.22,.61,.36,1);display:flex}.carousel-track.no-transition{transition:none}.carousel-card{background:0 0;justify-content:center;align-items:center;min-width:64%;height:100%;padding-block:14px;display:flex;overflow:hidden;transform:none}.carousel-media{background:0 0;border:0;border-radius:10px;width:calc(100% - 18px);height:100%;position:relative;overflow:hidden;transform:none}.carousel-card img{object-fit:cover;width:100%;height:100%;display:block}.carousel-shade{background:linear-gradient(#08101633 0%,#0f141814 48%,#040c1257 100%);position:absolute;inset:0}.carousel-title{z-index:2;color:#fff;text-shadow:0 2px 8px #000000bf;background:linear-gradient(#0000 0%,#0000009e 48%,#000000e6 100%);min-width:0;padding:38px 18px 14px;position:absolute;bottom:0;left:0;right:0}.carousel-title h3{letter-spacing:.05em;margin:0;font-family:STSong,Songti SC,serif;font-size:14px;line-height:1.45}.carousel-title-series,.carousel-title-episode{display:inline}.carousel-title-episode{margin-left:.45em}.play-button{z-index:3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);cursor:pointer;background:#12191e66;border:1px solid #ffffffb3;border-radius:50%;place-items:center;width:74px;height:74px;transition:transform .2s,background .2s;display:grid;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 8px 30px #00000042,inset 0 0 0 7px #ffffff14}.play-button:hover{background:#b51f24e0;transform:translate(-50%,-50%)scale(1.08)}.play-button:focus-visible{outline-offset:4px;outline:3px solid #fffc}.play-button span{filter:drop-shadow(0 2px 4px #00000059);border-top:11px solid #0000;border-bottom:11px solid #0000;border-left:17px solid #fff;width:0;height:0;margin-left:5px}.carousel-controls{justify-content:center;align-items:center;gap:14px;min-height:38px;padding-top:12px;display:flex}.carousel-arrow{z-index:4;color:#8d171c;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);cursor:pointer;background:#ffffff9e;border:1px solid #b51f244d;border-radius:50%;width:32px;height:32px;padding:0;font:300 25px/1 Arial,sans-serif;transition:background .18s,color .18s;position:static;transform:none}.carousel-arrow:hover{color:#fff;background:#b51f24e0}.carousel-count{z-index:4;color:#fff;text-shadow:0 2px 8px #000000a6;align-items:baseline;gap:5px;font-family:Arial,sans-serif;display:flex;position:absolute;bottom:20px;right:20%}.carousel-count strong{font-size:22px}.carousel-count span{color:#ffffffa3;font-size:11px}.carousel-dots{justify-content:center;gap:8px;padding:0;display:flex}.carousel-dots button{cursor:pointer;background:#b7a7a7;border:0;border-radius:9px;width:8px;height:8px;padding:0;transition:width .25s,background .25s}.carousel-dots button.active{background:var(--blue);width:30px}.course-card{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffeb;border:1px solid #bad8ebd1;border-radius:16px;grid-template-columns:minmax(0,.88fr) minmax(480px,1.12fr);gap:42px;width:100%;margin:0;padding:34px;display:grid;box-shadow:0 18px 55px #16578021}.course-copy{padding:3px 4px 4px}.lesson-label{color:var(--blue);letter-spacing:.14em;align-items:center;gap:10px;font-size:13px;font-weight:600;display:flex}.lesson-label span{color:#fff;letter-spacing:0;background:linear-gradient(135deg,#176fba,#07558f);border-radius:8px;place-items:center;width:31px;height:31px;font:700 13px Arial,sans-serif;display:grid;box-shadow:0 6px 13px #0d67a538}.course-copy h2{color:#103f62;letter-spacing:.05em;margin:21px 0 7px;font-family:STSong,Songti SC,serif;font-size:30px}.course-subtitle{color:#7890a0;margin:0;font-size:13px}.course-divider{background:var(--blue);border-radius:4px;width:52px;height:3px;margin:21px 0 22px}.course-copy h3{color:#244d69;letter-spacing:.12em;margin:0 0 12px;font-size:15px}.description{color:#526f81;text-align:justify;margin:0;font-size:14px;line-height:2}.course-link{color:#fff;background:linear-gradient(100deg,#116eb0,#07558f);border-radius:8px;align-items:center;gap:20px;width:max-content;margin-top:22px;padding:11px 17px;font-size:13px;transition:transform .18s,box-shadow .18s;display:flex;box-shadow:0 7px 18px #0d67a538}.course-link:hover{transform:translateY(-2px);box-shadow:0 10px 23px #0d67a547}.course-link:focus-visible{outline-offset:3px;outline:3px solid #0d67a547}.course-link b{font-size:17px;font-weight:400}.video-column{min-width:0}.video-heading{color:#3e6076;letter-spacing:.1em;align-items:center;gap:9px;height:31px;font-size:13px;font-weight:600;display:flex}.video-heading span{background:var(--blue);border-radius:4px;width:4px;height:15px}.video-frame{aspect-ratio:16/9;background:#082d49;border:7px solid #fff;border-radius:12px;position:relative;overflow:hidden;box-shadow:0 10px 28px #0d3f6033}.video-frame iframe{background:#082d49;border:0;width:100%;height:100%}.video-note{color:#8397a4;margin:13px 2px 0;font-size:11px;line-height:1.65}footer{color:#3d2b2b;text-align:center;letter-spacing:.15em;font-size:12px}@media (max-width:900px){.course-card{grid-template-columns:1fr;gap:30px}.video-column{order:-1}}@media (max-width:620px){.topbar{height:68px;padding:0 18px}.brand-mark{width:41px;height:41px;font-size:12px}.brand-copy strong{font-size:16px}.brand-copy small,.header-tag{display:none}.hero{padding:42px 18px 32px}.hero h1{letter-spacing:.08em;text-indent:.08em;white-space:nowrap;font-size:clamp(22px,7vw,28px)}.hero>p:last-child{font-size:12px;line-height:1.7}.learning-sections{gap:36px;width:calc(100% - 24px)}.section-heading h2{font-size:22px}.placeholder-card{min-height:140px}.carousel-viewport{border-radius:12px}.carousel-card{padding-block:8px}.carousel-media{border-radius:7px;width:calc(100% - 10px)}.carousel-title{padding:30px 10px 8px}.carousel-title h3{letter-spacing:0;text-align:left;white-space:normal;width:100%;font-size:9px;line-height:1.35;overflow:hidden}.carousel-title-series,.carousel-title-episode{text-align:left;white-space:nowrap;text-overflow:ellipsis;width:100%;display:block;overflow:hidden}.carousel-title-episode{margin-left:0}.play-button{width:52px;height:52px}.play-button span{border-top-width:8px;border-bottom-width:8px;border-left-width:12px}.carousel-arrow.previous{left:-38px}.carousel-arrow.next{right:-38px}.carousel-count{bottom:11px;right:12%}.carousel-count strong{font-size:14px}.carousel-count span{font-size:9px}.carousel-controls{gap:11px;min-height:34px;padding-top:9px}.carousel-arrow{width:28px;height:28px;font-size:22px}.carousel-count{right:20%}.course-intro{padding:20px 18px}.course-intro p{font-size:13px;line-height:1.9}.live-teaching-card{min-height:300px;padding:22px 18px}.live-card-copy h3{font-size:18px}.live-play-button{width:60px;height:60px}.live-enter-link{justify-content:center;min-width:150px}}@media (max-width:760px){.teaching-grid{grid-template-columns:1fr;gap:36px}.lecture-gallery{grid-template-columns:1fr;gap:14px}.lecture-gallery img:last-child{grid-column:auto;width:100%}.class-teaching-gallery{grid-template-columns:1fr;gap:14px}}@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}